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"grunt-contrib-uglify": "^2.2.0", - "jasmine-node": "^1.14.5" + "grunt-contrib-uglify": "^4.0.1", + "jasmine": "^3.4.0" } } diff --git a/test/SpecRunner.html b/test/SpecRunner.html index d7606d2..eca6b31 100644 --- a/test/SpecRunner.html +++ b/test/SpecRunner.html @@ -2,22 +2,14 @@ - Jasmine Spec Runner v2.1.3 + Jasmine Spec Runner - - + + - - - - - - - - - - - + + + diff --git a/test/SpecRunnerMin.html b/test/SpecRunnerMin.html index 1bc0863..3d66508 100644 --- a/test/SpecRunnerMin.html +++ b/test/SpecRunnerMin.html @@ -2,22 +2,14 @@ - Jasmine Spec Runner v2.1.3 + Jasmine Spec Runner - - + + - - - - - - - - - - - + + + diff --git a/test/lib/benchmark.js/LICENSE.txt b/test/lib/benchmark.js/LICENSE.txt deleted file mode 100644 index 4a9583d..0000000 --- a/test/lib/benchmark.js/LICENSE.txt +++ /dev/null @@ -1,22 +0,0 @@ -Copyright 2010-2014 Mathias Bynens -Based on JSLitmus.js, copyright Robert Kieffer -Modified by John-David Dalton - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be -included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE -LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. \ No newline at end of file diff --git a/test/lib/benchmark.js/README.md b/test/lib/benchmark.js/README.md deleted file mode 100644 index 42eb47a..0000000 --- a/test/lib/benchmark.js/README.md +++ /dev/null @@ -1,116 +0,0 @@ -# Benchmark.js v1.0.0 - -A [robust](http://calendar.perfplanet.com/2010/bulletproof-javascript-benchmarks/ "Bulletproof JavaScript benchmarks") benchmarking library that works on nearly all JavaScript platforms, supports high-resolution timers, & returns statistically significant results. As seen on [jsPerf](http://jsperf.com/). - -## Documentation - -* [API Documentation](http://benchmarkjs.com/docs) -* Check out our [unit tests](http://benchmarkjs.com/tests) & [roadmap](https://github.com/bestiejs/benchmark.js/wiki/Roadmap) - -## Download - - * [Development source](https://raw.github.com/bestiejs/benchmark.js/v1.0.0/benchmark.js) - -## Installation - -Benchmark.js’ only hard dependency is [Lo-Dash](http://lodash.com/). -Include [platform.js](http://mths.be/platform) to populate [Benchmark.platform](http://benchmarkjs.com/docs#platform). - -In a browser: - -```html - - - -``` - -Optionally, expose Java’s nanosecond timer by adding the `nano` applet to the ``: - -```html - -``` - -Or enable Chrome’s microsecond timer by using the [command line switch](http://peter.sh/experiments/chromium-command-line-switches/#enable-benchmarking): - -``` - --enable-benchmarking -``` - -In an AMD loader: - -```js -require({ - 'paths': { - 'benchmark': 'path/to/benchmark', - 'lodash': 'path/to/lodash', - 'platform': 'path/to/platform' - } -}, -['benchmark'], function(Benchmark) {/*…*/}); -``` - -Using npm: - -```bash -$ npm i --save benchmark -``` - -In Node.js: - -```js -var Benchmark = require('benchmark'); -``` - -Optionally, use the [microtime module](https://github.com/wadey/node-microtime) by Wade Simmons: - -```bash -npm install microtime -``` - -Usage example: - -```js -var suite = new Benchmark.Suite; - -// add tests -suite.add('RegExp#test', function() { - /o/.test('Hello World!'); -}) -.add('String#indexOf', function() { - 'Hello World!'.indexOf('o') > -1; -}) -// add listeners -.on('cycle', function(event) { - console.log(String(event.target)); -}) -.on('complete', function() { - console.log('Fastest is ' + this.filter('fastest').pluck('name')); -}) -// run async -.run({ 'async': true }); - -// logs: -// => RegExp#test x 4,161,532 +-0.99% (59 cycles) -// => String#indexOf x 6,139,623 +-1.00% (131 cycles) -// => Fastest is String#indexOf -``` - -## Support - -Tested in Chrome 35-36, Firefox 29-30, IE 6-11, Opera 22-23, Safari 5-7, Node.js 0.8.26~0.10.29, PhantomJS 1.9.7, RingoJS 0.9, & Rhino 1.7RC5. - -## BestieJS - -Benchmark.js is part of the BestieJS *“Best in Class”* module collection. This means we promote solid browser/environment support, ES5+ precedents, unit testing, & plenty of documentation. - -## Authors - -| [![twitter/mathias](http://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") | [![twitter/jdalton](http://gravatar.com/avatar/299a3d891ff1920b69c364d061007043?s=70)](https://twitter.com/jdalton "Follow @jdalton on Twitter") | -|---|---| -| [Mathias Bynens](http://mathiasbynens.be/) | [John-David Dalton](http://allyoucanleet.com/) | - -## Contributors - -| [![twitter/kitcambridge](http://gravatar.com/avatar/6662a1d02f351b5ef2f8b4d815804661?s=70)](https://twitter.com/kitcambridge "Follow @kitcambridge on Twitter") | -|---| -| [Kit Cambridge](http://kitcambridge.be/) | diff --git a/test/lib/benchmark.js/benchmark.js b/test/lib/benchmark.js/benchmark.js deleted file mode 100644 index e9dae44..0000000 --- a/test/lib/benchmark.js/benchmark.js +++ /dev/null @@ -1,2876 +0,0 @@ -/*! - * Benchmark.js v1.0.0 - * Copyright 2010-2014 Mathias Bynens - * Based on JSLitmus.js, copyright Robert Kieffer - * Modified by John-David Dalton - * Available under MIT license - */ -;(function() { - 'use strict'; - - /** Used as a safe reference for `undefined` in pre ES5 environments */ - var undefined; - - /** Used to determine if values are of the language type Object */ - var objectTypes = { - 'function': true, - 'object': true - }; - - /** Used as a reference to the global object */ - var root = (objectTypes[typeof window] && window) || this; - - /** Detect free variable `define` */ - var freeDefine = typeof define == 'function' && typeof define.amd == 'object' && define.amd && define; - - /** Detect free variable `exports` */ - var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports; - - /** Detect free variable `module` */ - var freeModule = objectTypes[typeof module] && module && !module.nodeType && module; - - /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */ - var freeGlobal = freeExports && freeModule && typeof global == 'object' && global; - if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) { - root = freeGlobal; - } - - /** Detect free variable `require` */ - var freeRequire = typeof require == 'function' && require; - - /** Used to assign each benchmark an incrimented id */ - var counter = 0; - - /** Detect the popular CommonJS extension `module.exports` */ - var moduleExports = freeModule && freeModule.exports === freeExports && freeExports; - - /** Used to detect primitive types */ - var rePrimitive = /^(?:boolean|number|string|undefined)$/; - - /** Used to make every compiled test unique */ - var uidCounter = 0; - - /** Used to assign default `context` object properties */ - var contextProps = [ - 'Array', 'Date', 'Function', 'Math', 'Object', 'RegExp', 'String', '_', - 'clearTimeout', 'chrome', 'chromium', 'document', 'java', 'navigator', - 'phantom', 'platform', 'process', 'runtime', 'setTimeout' - ]; - - /** Used to avoid hz of Infinity */ - var divisors = { - '1': 4096, - '2': 512, - '3': 64, - '4': 8, - '5': 0 - }; - - /** - * T-Distribution two-tailed critical values for 95% confidence - * http://www.itl.nist.gov/div898/handbook/eda/section3/eda3672.htm - */ - var tTable = { - '1': 12.706,'2': 4.303, '3': 3.182, '4': 2.776, '5': 2.571, '6': 2.447, - '7': 2.365, '8': 2.306, '9': 2.262, '10': 2.228, '11': 2.201, '12': 2.179, - '13': 2.16, '14': 2.145, '15': 2.131, '16': 2.12, '17': 2.11, '18': 2.101, - '19': 2.093, '20': 2.086, '21': 2.08, '22': 2.074, '23': 2.069, '24': 2.064, - '25': 2.06, '26': 2.056, '27': 2.052, '28': 2.048, '29': 2.045, '30': 2.042, - 'infinity': 1.96 - }; - - /** - * Critical Mann-Whitney U-values for 95% confidence - * http://www.saburchill.com/IBbiology/stats/003.html - */ - var uTable = { - '5': [0, 1, 2], - '6': [1, 2, 3, 5], - '7': [1, 3, 5, 6, 8], - '8': [2, 4, 6, 8, 10, 13], - '9': [2, 4, 7, 10, 12, 15, 17], - '10': [3, 5, 8, 11, 14, 17, 20, 23], - '11': [3, 6, 9, 13, 16, 19, 23, 26, 30], - '12': [4, 7, 11, 14, 18, 22, 26, 29, 33, 37], - '13': [4, 8, 12, 16, 20, 24, 28, 33, 37, 41, 45], - '14': [5, 9, 13, 17, 22, 26, 31, 36, 40, 45, 50, 55], - '15': [5, 10, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59, 64], - '16': [6, 11, 15, 21, 26, 31, 37, 42, 47, 53, 59, 64, 70, 75], - '17': [6, 11, 17, 22, 28, 34, 39, 45, 51, 57, 63, 67, 75, 81, 87], - '18': [7, 12, 18, 24, 30, 36, 42, 48, 55, 61, 67, 74, 80, 86, 93, 99], - '19': [7, 13, 19, 25, 32, 38, 45, 52, 58, 65, 72, 78, 85, 92, 99, 106, 113], - '20': [8, 14, 20, 27, 34, 41, 48, 55, 62, 69, 76, 83, 90, 98, 105, 112, 119, 127], - '21': [8, 15, 22, 29, 36, 43, 50, 58, 65, 73, 80, 88, 96, 103, 111, 119, 126, 134, 142], - '22': [9, 16, 23, 30, 38, 45, 53, 61, 69, 77, 85, 93, 101, 109, 117, 125, 133, 141, 150, 158], - '23': [9, 17, 24, 32, 40, 48, 56, 64, 73, 81, 89, 98, 106, 115, 123, 132, 140, 149, 157, 166, 175], - '24': [10, 17, 25, 33, 42, 50, 59, 67, 76, 85, 94, 102, 111, 120, 129, 138, 147, 156, 165, 174, 183, 192], - '25': [10, 18, 27, 35, 44, 53, 62, 71, 80, 89, 98, 107, 117, 126, 135, 145, 154, 163, 173, 182, 192, 201, 211], - '26': [11, 19, 28, 37, 46, 55, 64, 74, 83, 93, 102, 112, 122, 132, 141, 151, 161, 171, 181, 191, 200, 210, 220, 230], - '27': [11, 20, 29, 38, 48, 57, 67, 77, 87, 97, 107, 118, 125, 138, 147, 158, 168, 178, 188, 199, 209, 219, 230, 240, 250], - '28': [12, 21, 30, 40, 50, 60, 70, 80, 90, 101, 111, 122, 132, 143, 154, 164, 175, 186, 196, 207, 218, 228, 239, 250, 261, 272], - '29': [13, 22, 32, 42, 52, 62, 73, 83, 94, 105, 116, 127, 138, 149, 160, 171, 182, 193, 204, 215, 226, 238, 249, 260, 271, 282, 294], - '30': [13, 23, 33, 43, 54, 65, 76, 87, 98, 109, 120, 131, 143, 154, 166, 177, 189, 200, 212, 223, 235, 247, 258, 270, 282, 293, 305, 317] - }; - - /*--------------------------------------------------------------------------*/ - - /** - * Create a new `Benchmark` function using the given `context` object. - * - * @static - * @memberOf Benchmark - * @param {Object} [context=root] The context object. - * @returns {Function} Returns a new `Benchmark` function. - */ - function runInContext(context) { - // exit early if unable to acquire Lo-Dash - var _ = context && context._ || req('lodash') || root._; - if (!_) { - Benchmark.runInContext = runInContext; - return Benchmark; - } - // Avoid issues with some ES3 environments that attempt to use values, named - // after built-in constructors like `Object`, for the creation of literals. - // ES5 clears this up by stating that literals must use built-in constructors. - // See http://es5.github.io/#x11.1.5. - context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root; - - /** Native constructor references */ - var Array = context.Array, - Date = context.Date, - Function = context.Function, - Math = context.Math, - Object = context.Object, - RegExp = context.RegExp, - String = context.String; - - /** Used for `Array` and `Object` method references */ - var arrayRef = [], - objectProto = Object.prototype; - - /** Native method shortcuts */ - var abs = Math.abs, - clearTimeout = context.clearTimeout, - floor = Math.floor, - log = Math.log, - max = Math.max, - min = Math.min, - pow = Math.pow, - push = arrayRef.push, - setTimeout = context.setTimeout, - shift = arrayRef.shift, - slice = arrayRef.slice, - sqrt = Math.sqrt, - toString = objectProto.toString, - unshift = arrayRef.unshift; - - /** Detect DOM document object */ - var doc = isHostType(context, 'document') && context.document; - - /** Used to access Wade Simmons' Node.js `microtime` module */ - var microtimeObject = req('microtime'); - - /** Used to access Node.js's high resolution timer */ - var processObject = isHostType(context, 'process') && context.process; - - /** Used to prevent a `removeChild` memory leak in IE < 9 */ - var trash = doc && doc.createElement('div'); - - /** Used to integrity check compiled tests */ - var uid = 'uid' + _.now(); - - /** Used to avoid infinite recursion when methods call each other */ - var calledBy = {}; - - /** - * An object used to flag environments/features. - * - * @static - * @memberOf Benchmark - * @type Object - */ - var support = {}; - - (function() { - - /** - * Detect if running in a browser environment. - * - * @memberOf Benchmark.support - * @type boolean - */ - support.browser = doc && isHostType(context, 'navigator') && !isHostType(context, 'phantom'); - - /** - * Detect if Java is enabled/exposed. - * - * @memberOf Benchmark.support - * @type boolean - */ - support.java = isClassOf(context.java, 'JavaPackage'); - - /** - * Detect if the Timers API exists. - * - * @memberOf Benchmark.support - * @type boolean - */ - support.timeout = isHostType(context, 'setTimeout') && isHostType(context, 'clearTimeout'); - - /** - * Detect if `Array#unshift` returns the new length of the array (all but IE < 8). - * - * @memberOf Benchmark.support - * @type boolean - */ - support.unshiftResult = !![].unshift(1); - - /** - * Detect if function decompilation is support. - * - * @name decompilation - * @memberOf Benchmark.support - * @type boolean - */ - try { - // Safari 2.x removes commas in object literals - // from `Function#toString` results - // http://webk.it/11609 - // Firefox 3.6 and Opera 9.25 strip grouping - // parentheses from `Function#toString` results - // http://bugzil.la/559438 - support.decompilation = Function( - ('return (' + (function(x) { return { 'x': '' + (1 + x) + '', 'y': 0 }; }) + ')') - // avoid issues with code added by Istanbul - .replace(/__cov__[^;]+;/g, '') - )()(0).x === '1'; - } catch(e) { - support.decompilation = false; - } - }()); - - /** - * Timer object used by `clock()` and `Deferred#resolve`. - * - * @private - * @type Object - */ - var timer = { - - /** - * The timer namespace object or constructor. - * - * @private - * @memberOf timer - * @type {Function|Object} - */ - 'ns': Date, - - /** - * Starts the deferred timer. - * - * @private - * @memberOf timer - * @param {Object} deferred The deferred instance. - */ - 'start': null, // lazy defined in `clock()` - - /** - * Stops the deferred timer. - * - * @private - * @memberOf timer - * @param {Object} deferred The deferred instance. - */ - 'stop': null // lazy defined in `clock()` - }; - - /*------------------------------------------------------------------------*/ - - /** - * The Benchmark constructor. - * - * Note: The Benchmark constructor exposes a handful of Lo-Dash methods to - * make working with arrays, collections, and objects easier. The Lo-Dash - * methods are: - * [`each/forEach`](http://lodash.com/docs#forEach), [`forOwn`](http://lodash.com/docs#forOwn), - * [`has`](http://lodash.com/docs#has), [`indexOf`](http://lodash.com/docs#indexOf), - * [`map`](http://lodash.com/docs#map), [`pluck`](http://lodash.com/docs#pluck), - * and [`reduce`](http://lodash.com/docs#reduce) - * - * @constructor - * @param {string} name A name to identify the benchmark. - * @param {Function|string} fn The test to benchmark. - * @param {Object} [options={}] Options object. - * @example - * - * // basic usage (the `new` operator is optional) - * var bench = new Benchmark(fn); - * - * // or using a name first - * var bench = new Benchmark('foo', fn); - * - * // or with options - * var bench = new Benchmark('foo', fn, { - * - * // displayed by `Benchmark#toString` if `name` is not available - * 'id': 'xyz', - * - * // called when the benchmark starts running - * 'onStart': onStart, - * - * // called after each run cycle - * 'onCycle': onCycle, - * - * // called when aborted - * 'onAbort': onAbort, - * - * // called when a test errors - * 'onError': onError, - * - * // called when reset - * 'onReset': onReset, - * - * // called when the benchmark completes running - * 'onComplete': onComplete, - * - * // compiled/called before the test loop - * 'setup': setup, - * - * // compiled/called after the test loop - * 'teardown': teardown - * }); - * - * // or name and options - * var bench = new Benchmark('foo', { - * - * // a flag to indicate the benchmark is deferred - * 'defer': true, - * - * // benchmark test function - * 'fn': function(deferred) { - * // call `Deferred#resolve` when the deferred test is finished - * deferred.resolve(); - * } - * }); - * - * // or options only - * var bench = new Benchmark({ - * - * // benchmark name - * 'name': 'foo', - * - * // benchmark test as a string - * 'fn': '[1,2,3,4].sort()' - * }); - * - * // a test's `this` binding is set to the benchmark instance - * var bench = new Benchmark('foo', function() { - * 'My name is '.concat(this.name); // "My name is foo" - * }); - */ - function Benchmark(name, fn, options) { - var bench = this; - - // allow instance creation without the `new` operator - if (bench == null || bench.constructor != Benchmark) { - return new Benchmark(name, fn, options); - } - // juggle arguments - if (_.isPlainObject(name)) { - // 1 argument (options) - options = name; - } - else if (_.isFunction(name)) { - // 2 arguments (fn, options) - options = fn; - fn = name; - } - else if (_.isPlainObject(fn)) { - // 2 arguments (name, options) - options = fn; - fn = null; - bench.name = name; - } - else { - // 3 arguments (name, fn [, options]) - bench.name = name; - } - setOptions(bench, options); - - bench.id || (bench.id = ++counter); - bench.fn == null && (bench.fn = fn); - - bench.stats = cloneDeep(bench.stats); - bench.times = cloneDeep(bench.times); - } - - /** - * The Deferred constructor. - * - * @constructor - * @memberOf Benchmark - * @param {Object} clone The cloned benchmark instance. - */ - function Deferred(clone) { - var deferred = this; - if (deferred == null || deferred.constructor != Deferred) { - return new Deferred(clone); - } - deferred.benchmark = clone; - clock(deferred); - } - - /** - * The Event constructor. - * - * @constructor - * @memberOf Benchmark - * @param {Object|string} type The event type. - */ - function Event(type) { - var event = this; - if (type instanceof Event) { - return type; - } - return (event == null || event.constructor != Event) - ? new Event(type) - : _.assign(event, { 'timeStamp': _.now() }, typeof type == 'string' ? { 'type': type } : type); - } - - /** - * The Suite constructor. - * - * Note: Each Suite instance has a handful of wrapped Lo-Dash methods to - * make working with Suites easier. The wrapped Lo-Dash methods are: - * [`each/forEach`](http://lodash.com/docs#forEach), [`indexOf`](http://lodash.com/docs#indexOf), - * [`map`](http://lodash.com/docs#map), [`pluck`](http://lodash.com/docs#pluck), - * and [`reduce`](http://lodash.com/docs#reduce) - * - * @constructor - * @memberOf Benchmark - * @param {string} name A name to identify the suite. - * @param {Object} [options={}] Options object. - * @example - * - * // basic usage (the `new` operator is optional) - * var suite = new Benchmark.Suite; - * - * // or using a name first - * var suite = new Benchmark.Suite('foo'); - * - * // or with options - * var suite = new Benchmark.Suite('foo', { - * - * // called when the suite starts running - * 'onStart': onStart, - * - * // called between running benchmarks - * 'onCycle': onCycle, - * - * // called when aborted - * 'onAbort': onAbort, - * - * // called when a test errors - * 'onError': onError, - * - * // called when reset - * 'onReset': onReset, - * - * // called when the suite completes running - * 'onComplete': onComplete - * }); - */ - function Suite(name, options) { - var suite = this; - - // allow instance creation without the `new` operator - if (suite == null || suite.constructor != Suite) { - return new Suite(name, options); - } - // juggle arguments - if (_.isPlainObject(name)) { - // 1 argument (options) - options = name; - } else { - // 2 arguments (name [, options]) - suite.name = name; - } - setOptions(suite, options); - } - - /*------------------------------------------------------------------------*/ - - /** - * A deep clone utility. - * - * @private - * @param {*} value The value to clone. - * @returns {*} The cloned value. - */ - var cloneDeep = _.partialRight(_.cloneDeep, function(value) { - // only clone primitives, arrays, and plain objects - return (typeof value == 'object' && !_.isArray(value) && !_.isPlainObject(value)) - ? value - : undefined; - }); - - /** - * Creates a function from the given arguments string and body. - * - * @private - * @param {string} args The comma separated function arguments. - * @param {string} body The function body. - * @returns {Function} The new function. - */ - function createFunction() { - // lazy define - createFunction = function(args, body) { - var result, - anchor = freeDefine ? freeDefine.amd : Benchmark, - prop = uid + 'createFunction'; - - runScript((freeDefine ? 'define.amd.' : 'Benchmark.') + prop + '=function(' + args + '){' + body + '}'); - result = anchor[prop]; - delete anchor[prop]; - return result; - }; - // fix JaegerMonkey bug - // http://bugzil.la/639720 - createFunction = support.browser && (createFunction('', 'return"' + uid + '"') || _.noop)() == uid ? createFunction : Function; - return createFunction.apply(null, arguments); - } - - /** - * Delay the execution of a function based on the benchmark's `delay` property. - * - * @private - * @param {Object} bench The benchmark instance. - * @param {Object} fn The function to execute. - */ - function delay(bench, fn) { - bench._timerId = _.delay(fn, bench.delay * 1e3); - } - - /** - * Destroys the given element. - * - * @private - * @param {Element} element The element to destroy. - */ - function destroyElement(element) { - trash.appendChild(element); - trash.innerHTML = ''; - } - - /** - * Gets the name of the first argument from a function's source. - * - * @private - * @param {Function} fn The function. - * @returns {string} The argument name. - */ - function getFirstArgument(fn) { - return (!_.has(fn, 'toString') && - (/^[\s(]*function[^(]*\(([^\s,)]+)/.exec(fn) || 0)[1]) || ''; - } - - /** - * Computes the arithmetic mean of a sample. - * - * @private - * @param {Array} sample The sample. - * @returns {number} The mean. - */ - function getMean(sample) { - return (_.reduce(sample, function(sum, x) { - return sum + x; - }) / sample.length) || 0; - } - - /** - * Gets the source code of a function. - * - * @private - * @param {Function} fn The function. - * @returns {string} The function's source code. - */ - function getSource(fn) { - var result = ''; - if (isStringable(fn)) { - result = String(fn); - } else if (support.decompilation) { - // escape the `{` for Firefox 1 - result = _.result(/^[^{]+\{([\s\S]*)\}\s*$/.exec(fn), 1); - } - // trim string - result = (result || '').replace(/^\s+|\s+$/g, ''); - - // detect strings containing only the "use strict" directive - return /^(?:\/\*+[\w\W]*?\*\/|\/\/.*?[\n\r\u2028\u2029]|\s)*(["'])use strict\1;?$/.test(result) - ? '' - : result; - } - - /** - * Checks if an object is of the specified class. - * - * @private - * @param {*} value The value to check. - * @param {string} name The name of the class. - * @returns {boolean} Returns `true` if the value is of the specified class, else `false`. - */ - function isClassOf(value, name) { - return value != null && toString.call(value) == '[object ' + name + ']'; - } - - /** - * Host objects can return type values that are different from their actual - * data type. The objects we are concerned with usually return non-primitive - * types of "object", "function", or "unknown". - * - * @private - * @param {*} object The owner of the property. - * @param {string} property The property to check. - * @returns {boolean} Returns `true` if the property value is a non-primitive, else `false`. - */ - function isHostType(object, property) { - if (object == null) { - return false; - } - var type = typeof object[property]; - return !rePrimitive.test(type) && (type != 'object' || !!object[property]); - } - - /** - * Checks if a value can be safely coerced to a string. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the value can be coerced, else `false`. - */ - function isStringable(value) { - return _.isString(value) || (_.has(value, 'toString') && _.isFunction(value.toString)); - } - - /** - * A wrapper around `require()` to suppress `module missing` errors. - * - * @private - * @param {string} id The module id. - * @returns {*} The exported module or `null`. - */ - function req(id) { - try { - var result = freeExports && freeRequire(id); - } catch(e) {} - return result || null; - } - - /** - * Runs a snippet of JavaScript via script injection. - * - * @private - * @param {string} code The code to run. - */ - function runScript(code) { - var anchor = freeDefine ? define.amd : Benchmark, - script = doc.createElement('script'), - sibling = doc.getElementsByTagName('script')[0], - parent = sibling.parentNode, - prop = uid + 'runScript', - prefix = '(' + (freeDefine ? 'define.amd.' : 'Benchmark.') + prop + '||function(){})();'; - - // Firefox 2.0.0.2 cannot use script injection as intended because it executes - // asynchronously, but that's OK because script injection is only used to avoid - // the previously commented JaegerMonkey bug. - try { - // remove the inserted script *before* running the code to avoid differences - // in the expected script element count/order of the document. - script.appendChild(doc.createTextNode(prefix + code)); - anchor[prop] = function() { destroyElement(script); }; - } catch(e) { - parent = parent.cloneNode(false); - sibling = null; - script.text = code; - } - parent.insertBefore(script, sibling); - delete anchor[prop]; - } - - /** - * A helper function for setting options/event handlers. - * - * @private - * @param {Object} object The benchmark or suite instance. - * @param {Object} [options={}] Options object. - */ - function setOptions(object, options) { - options = object.options = _.assign({}, cloneDeep(object.constructor.options), cloneDeep(options)); - - _.forOwn(options, function(value, key) { - if (value != null) { - // add event listeners - if (/^on[A-Z]/.test(key)) { - _.each(key.split(' '), function(key) { - object.on(key.slice(2).toLowerCase(), value); - }); - } else if (!_.has(object, key)) { - object[key] = cloneDeep(value); - } - } - }); - } - - /*------------------------------------------------------------------------*/ - - /** - * Handles cycling/completing the deferred benchmark. - * - * @memberOf Benchmark.Deferred - */ - function resolve() { - var deferred = this, - clone = deferred.benchmark, - bench = clone._original; - - if (bench.aborted) { - // cycle() -> clone cycle/complete event -> compute()'s invoked bench.run() cycle/complete - deferred.teardown(); - clone.running = false; - cycle(deferred); - } - else if (++deferred.cycles < clone.count) { - clone.compiled.call(deferred, context, timer); - } - else { - timer.stop(deferred); - deferred.teardown(); - delay(clone, function() { cycle(deferred); }); - } - } - - /*------------------------------------------------------------------------*/ - - /** - * A generic `Array#filter` like method. - * - * @static - * @memberOf Benchmark - * @param {Array} array The array to iterate over. - * @param {Function|string} callback The function/alias called per iteration. - * @param {*} thisArg The `this` binding for the callback. - * @returns {Array} A new array of values that passed callback filter. - * @example - * - * // get odd numbers - * Benchmark.filter([1, 2, 3, 4, 5], function(n) { - * return n % 2; - * }); // -> [1, 3, 5]; - * - * // get fastest benchmarks - * Benchmark.filter(benches, 'fastest'); - * - * // get slowest benchmarks - * Benchmark.filter(benches, 'slowest'); - * - * // get benchmarks that completed without erroring - * Benchmark.filter(benches, 'successful'); - */ - function filter(array, callback, thisArg) { - if (callback === 'successful') { - // callback to exclude those that are errored, unrun, or have hz of Infinity - callback = function(bench) { - return bench.cycles && _.isFinite(bench.hz); - }; - } - else if (callback === 'fastest' || callback === 'slowest') { - // get successful, sort by period + margin of error, and filter fastest/slowest - var result = filter(array, 'successful').sort(function(a, b) { - a = a.stats; b = b.stats; - return (a.mean + a.moe > b.mean + b.moe ? 1 : -1) * (callback === 'fastest' ? 1 : -1); - }); - - return _.filter(result, function(bench) { - return result[0].compare(bench) == 0; - }); - } - return _.filter(array, callback, thisArg); - } - - /** - * Converts a number to a more readable comma-separated string representation. - * - * @static - * @memberOf Benchmark - * @param {number} number The number to convert. - * @returns {string} The more readable string representation. - */ - function formatNumber(number) { - number = String(number).split('.'); - return number[0].replace(/(?=(?:\d{3})+$)(?!\b)/g, ',') + - (number[1] ? '.' + number[1] : ''); - } - - /** - * Invokes a method on all items in an array. - * - * @static - * @memberOf Benchmark - * @param {Array} benches Array of benchmarks to iterate over. - * @param {Object|string} name The name of the method to invoke OR options object. - * @param {...*} [args] Arguments to invoke the method with. - * @returns {Array} A new array of values returned from each method invoked. - * @example - * - * // invoke `reset` on all benchmarks - * Benchmark.invoke(benches, 'reset'); - * - * // invoke `emit` with arguments - * Benchmark.invoke(benches, 'emit', 'complete', listener); - * - * // invoke `run(true)`, treat benchmarks as a queue, and register invoke callbacks - * Benchmark.invoke(benches, { - * - * // invoke the `run` method - * 'name': 'run', - * - * // pass a single argument - * 'args': true, - * - * // treat as queue, removing benchmarks from front of `benches` until empty - * 'queued': true, - * - * // called before any benchmarks have been invoked. - * 'onStart': onStart, - * - * // called between invoking benchmarks - * 'onCycle': onCycle, - * - * // called after all benchmarks have been invoked. - * 'onComplete': onComplete - * }); - */ - function invoke(benches, name) { - var args, - bench, - queued, - index = -1, - eventProps = { 'currentTarget': benches }, - options = { 'onStart': _.noop, 'onCycle': _.noop, 'onComplete': _.noop }, - result = _.toArray(benches); - - /** - * Invokes the method of the current object and if synchronous, fetches the next. - */ - function execute() { - var listeners, - async = isAsync(bench); - - if (async) { - // use `getNext` as the first listener - bench.on('complete', getNext); - listeners = bench.events.complete; - listeners.splice(0, 0, listeners.pop()); - } - // execute method - result[index] = _.isFunction(bench && bench[name]) ? bench[name].apply(bench, args) : undefined; - // if synchronous return `true` until finished - return !async && getNext(); - } - - /** - * Fetches the next bench or executes `onComplete` callback. - */ - function getNext(event) { - var cycleEvent, - last = bench, - async = isAsync(last); - - if (async) { - last.off('complete', getNext); - last.emit('complete'); - } - // emit "cycle" event - eventProps.type = 'cycle'; - eventProps.target = last; - cycleEvent = Event(eventProps); - options.onCycle.call(benches, cycleEvent); - - // choose next benchmark if not exiting early - if (!cycleEvent.aborted && raiseIndex() !== false) { - bench = queued ? benches[0] : result[index]; - if (isAsync(bench)) { - delay(bench, execute); - } - else if (async) { - // resume execution if previously asynchronous but now synchronous - while (execute()) {} - } - else { - // continue synchronous execution - return true; - } - } else { - // emit "complete" event - eventProps.type = 'complete'; - options.onComplete.call(benches, Event(eventProps)); - } - // When used as a listener `event.aborted = true` will cancel the rest of - // the "complete" listeners because they were already called above and when - // used as part of `getNext` the `return false` will exit the execution while-loop. - if (event) { - event.aborted = true; - } else { - return false; - } - } - - /** - * Checks if invoking `Benchmark#run` with asynchronous cycles. - */ - function isAsync(object) { - // avoid using `instanceof` here because of IE memory leak issues with host objects - var async = args[0] && args[0].async; - return Object(object).constructor == Benchmark && name == 'run' && - ((async == null ? object.options.async : async) && support.timeout || object.defer); - } - - /** - * Raises `index` to the next defined index or returns `false`. - */ - function raiseIndex() { - index++; - - // if queued remove the previous bench - if (queued && index > 0) { - shift.call(benches); - } - // if we reached the last index then return `false` - return (queued ? benches.length : index < result.length) - ? index - : (index = false); - } - - // juggle arguments - if (_.isString(name)) { - // 2 arguments (array, name) - args = slice.call(arguments, 2); - } else { - // 2 arguments (array, options) - options = _.assign(options, name); - name = options.name; - args = _.isArray(args = 'args' in options ? options.args : []) ? args : [args]; - queued = options.queued; - } - - // start iterating over the array - if (raiseIndex() !== false) { - // emit "start" event - bench = result[index]; - eventProps.type = 'start'; - eventProps.target = bench; - options.onStart.call(benches, Event(eventProps)); - - // end early if the suite was aborted in an "onStart" listener - if (benches.aborted && benches.constructor == Suite && name == 'run') { - // emit "cycle" event - eventProps.type = 'cycle'; - options.onCycle.call(benches, Event(eventProps)); - // emit "complete" event - eventProps.type = 'complete'; - options.onComplete.call(benches, Event(eventProps)); - } - // else start - else { - if (isAsync(bench)) { - delay(bench, execute); - } else { - while (execute()) {} - } - } - } - return result; - } - - /** - * Creates a string of joined array values or object key-value pairs. - * - * @static - * @memberOf Benchmark - * @param {Array|Object} object The object to operate on. - * @param {string} [separator1=','] The separator used between key-value pairs. - * @param {string} [separator2=': '] The separator used between keys and values. - * @returns {string} The joined result. - */ - function join(object, separator1, separator2) { - var result = [], - length = (object = Object(object)).length, - arrayLike = length === length >>> 0; - - separator2 || (separator2 = ': '); - _.each(object, function(value, key) { - result.push(arrayLike ? value : key + separator2 + value); - }); - return result.join(separator1 || ','); - } - - /*------------------------------------------------------------------------*/ - - /** - * Aborts all benchmarks in the suite. - * - * @name abort - * @memberOf Benchmark.Suite - * @returns {Object} The suite instance. - */ - function abortSuite() { - var event, - suite = this, - resetting = calledBy.resetSuite; - - if (suite.running) { - event = Event('abort'); - suite.emit(event); - if (!event.cancelled || resetting) { - // avoid infinite recursion - calledBy.abortSuite = true; - suite.reset(); - delete calledBy.abortSuite; - - if (!resetting) { - suite.aborted = true; - invoke(suite, 'abort'); - } - } - } - return suite; - } - - /** - * Adds a test to the benchmark suite. - * - * @memberOf Benchmark.Suite - * @param {string} name A name to identify the benchmark. - * @param {Function|string} fn The test to benchmark. - * @param {Object} [options={}] Options object. - * @returns {Object} The benchmark instance. - * @example - * - * // basic usage - * suite.add(fn); - * - * // or using a name first - * suite.add('foo', fn); - * - * // or with options - * suite.add('foo', fn, { - * 'onCycle': onCycle, - * 'onComplete': onComplete - * }); - * - * // or name and options - * suite.add('foo', { - * 'fn': fn, - * 'onCycle': onCycle, - * 'onComplete': onComplete - * }); - * - * // or options only - * suite.add({ - * 'name': 'foo', - * 'fn': fn, - * 'onCycle': onCycle, - * 'onComplete': onComplete - * }); - */ - function add(name, fn, options) { - var suite = this, - bench = new Benchmark(name, fn, options), - event = Event({ 'type': 'add', 'target': bench }); - - if (suite.emit(event), !event.cancelled) { - suite.push(bench); - } - return suite; - } - - /** - * Creates a new suite with cloned benchmarks. - * - * @name clone - * @memberOf Benchmark.Suite - * @param {Object} options Options object to overwrite cloned options. - * @returns {Object} The new suite instance. - */ - function cloneSuite(options) { - var suite = this, - result = new suite.constructor(_.assign({}, suite.options, options)); - - // copy own properties - _.forOwn(suite, function(value, key) { - if (!_.has(result, key)) { - result[key] = value && _.isFunction(value.clone) - ? value.clone() - : cloneDeep(value); - } - }); - return result; - } - - /** - * An `Array#filter` like method. - * - * @name filter - * @memberOf Benchmark.Suite - * @param {Function|string} callback The function/alias called per iteration. - * @returns {Object} A new suite of benchmarks that passed callback filter. - */ - function filterSuite(callback) { - var suite = this, - result = new suite.constructor(suite.options); - - result.push.apply(result, filter(suite, callback)); - return result; - } - - /** - * Resets all benchmarks in the suite. - * - * @name reset - * @memberOf Benchmark.Suite - * @returns {Object} The suite instance. - */ - function resetSuite() { - var event, - suite = this, - aborting = calledBy.abortSuite; - - if (suite.running && !aborting) { - // no worries, `resetSuite()` is called within `abortSuite()` - calledBy.resetSuite = true; - suite.abort(); - delete calledBy.resetSuite; - } - // reset if the state has changed - else if ((suite.aborted || suite.running) && - (suite.emit(event = Event('reset')), !event.cancelled)) { - suite.aborted = suite.running = false; - if (!aborting) { - invoke(suite, 'reset'); - } - } - return suite; - } - - /** - * Runs the suite. - * - * @name run - * @memberOf Benchmark.Suite - * @param {Object} [options={}] Options object. - * @returns {Object} The suite instance. - * @example - * - * // basic usage - * suite.run(); - * - * // or with options - * suite.run({ 'async': true, 'queued': true }); - */ - function runSuite(options) { - var suite = this; - - suite.reset(); - suite.running = true; - options || (options = {}); - - invoke(suite, { - 'name': 'run', - 'args': options, - 'queued': options.queued, - 'onStart': function(event) { - suite.emit(event); - }, - 'onCycle': function(event) { - var bench = event.target; - if (bench.error) { - suite.emit({ 'type': 'error', 'target': bench }); - } - suite.emit(event); - event.aborted = suite.aborted; - }, - 'onComplete': function(event) { - suite.running = false; - suite.emit(event); - } - }); - return suite; - } - - /*------------------------------------------------------------------------*/ - - /** - * Executes all registered listeners of the specified event type. - * - * @memberOf Benchmark, Benchmark.Suite - * @param {Object|string} type The event type or object. - * @param {...*} [args] Arguments to invoke the listener with. - * @returns {*} Returns the return value of the last listener executed. - */ - function emit(type) { - var listeners, - object = this, - event = Event(type), - events = object.events, - args = (arguments[0] = event, arguments); - - event.currentTarget || (event.currentTarget = object); - event.target || (event.target = object); - delete event.result; - - if (events && (listeners = _.has(events, event.type) && events[event.type])) { - _.each(listeners.slice(), function(listener) { - if ((event.result = listener.apply(object, args)) === false) { - event.cancelled = true; - } - return !event.aborted; - }); - } - return event.result; - } - - /** - * Returns an array of event listeners for a given type that can be manipulated - * to add or remove listeners. - * - * @memberOf Benchmark, Benchmark.Suite - * @param {string} type The event type. - * @returns {Array} The listeners array. - */ - function listeners(type) { - var object = this, - events = object.events || (object.events = {}); - - return _.has(events, type) ? events[type] : (events[type] = []); - } - - /** - * Unregisters a listener for the specified event type(s), - * or unregisters all listeners for the specified event type(s), - * or unregisters all listeners for all event types. - * - * @memberOf Benchmark, Benchmark.Suite - * @param {string} [type] The event type. - * @param {Function} [listener] The function to unregister. - * @returns {Object} The benchmark instance. - * @example - * - * // unregister a listener for an event type - * bench.off('cycle', listener); - * - * // unregister a listener for multiple event types - * bench.off('start cycle', listener); - * - * // unregister all listeners for an event type - * bench.off('cycle'); - * - * // unregister all listeners for multiple event types - * bench.off('start cycle complete'); - * - * // unregister all listeners for all event types - * bench.off(); - */ - function off(type, listener) { - var object = this, - events = object.events; - - if (!events) { - return object; - } - _.each(type ? type.split(' ') : events, function(listeners, type) { - var index; - if (typeof listeners == 'string') { - type = listeners; - listeners = _.has(events, type) && events[type]; - } - if (listeners) { - if (listener) { - index = _.indexOf(listeners, listener); - if (index > -1) { - listeners.splice(index, 1); - } - } else { - listeners.length = 0; - } - } - }); - return object; - } - - /** - * Registers a listener for the specified event type(s). - * - * @memberOf Benchmark, Benchmark.Suite - * @param {string} type The event type. - * @param {Function} listener The function to register. - * @returns {Object} The benchmark instance. - * @example - * - * // register a listener for an event type - * bench.on('cycle', listener); - * - * // register a listener for multiple event types - * bench.on('start cycle', listener); - */ - function on(type, listener) { - var object = this, - events = object.events || (object.events = {}); - - _.each(type.split(' '), function(type) { - (_.has(events, type) - ? events[type] - : (events[type] = []) - ).push(listener); - }); - return object; - } - - /*------------------------------------------------------------------------*/ - - /** - * Aborts the benchmark without recording times. - * - * @memberOf Benchmark - * @returns {Object} The benchmark instance. - */ - function abort() { - var event, - bench = this, - resetting = calledBy.reset; - - if (bench.running) { - event = Event('abort'); - bench.emit(event); - if (!event.cancelled || resetting) { - // avoid infinite recursion - calledBy.abort = true; - bench.reset(); - delete calledBy.abort; - - if (support.timeout) { - clearTimeout(bench._timerId); - delete bench._timerId; - } - if (!resetting) { - bench.aborted = true; - bench.running = false; - } - } - } - return bench; - } - - /** - * Creates a new benchmark using the same test and options. - * - * @memberOf Benchmark - * @param {Object} options Options object to overwrite cloned options. - * @returns {Object} The new benchmark instance. - * @example - * - * var bizarro = bench.clone({ - * 'name': 'doppelganger' - * }); - */ - function clone(options) { - var bench = this, - result = new bench.constructor(_.assign({}, bench, options)); - - // correct the `options` object - result.options = _.assign({}, cloneDeep(bench.options), cloneDeep(options)); - - // copy own custom properties - _.forOwn(bench, function(value, key) { - if (!_.has(result, key)) { - result[key] = cloneDeep(value); - } - }); - - return result; - } - - /** - * Determines if a benchmark is faster than another. - * - * @memberOf Benchmark - * @param {Object} other The benchmark to compare. - * @returns {number} Returns `-1` if slower, `1` if faster, and `0` if indeterminate. - */ - function compare(other) { - var critical, - zStat, - bench = this, - sample1 = bench.stats.sample, - sample2 = other.stats.sample, - size1 = sample1.length, - size2 = sample2.length, - maxSize = max(size1, size2), - minSize = min(size1, size2), - u1 = getU(sample1, sample2), - u2 = getU(sample2, sample1), - u = min(u1, u2); - - function getScore(xA, sampleB) { - return _.reduce(sampleB, function(total, xB) { - return total + (xB > xA ? 0 : xB < xA ? 1 : 0.5); - }, 0); - } - - function getU(sampleA, sampleB) { - return _.reduce(sampleA, function(total, xA) { - return total + getScore(xA, sampleB); - }, 0); - } - - function getZ(u) { - return (u - ((size1 * size2) / 2)) / sqrt((size1 * size2 * (size1 + size2 + 1)) / 12); - } - - // exit early if comparing the same benchmark - if (bench == other) { - return 0; - } - // reject the null hyphothesis the two samples come from the - // same population (i.e. have the same median) if... - if (size1 + size2 > 30) { - // ...the z-stat is greater than 1.96 or less than -1.96 - // http://www.statisticslectures.com/topics/mannwhitneyu/ - zStat = getZ(u); - return abs(zStat) > 1.96 ? (u == u1 ? 1 : -1) : 0; - } - // ...the U value is less than or equal the critical U value - critical = maxSize < 5 || minSize < 3 ? 0 : uTable[maxSize][minSize - 3]; - return u <= critical ? (u == u1 ? 1 : -1) : 0; - } - - /** - * Reset properties and abort if running. - * - * @memberOf Benchmark - * @returns {Object} The benchmark instance. - */ - function reset() { - var bench = this; - if (bench.running && !calledBy.abort) { - // no worries, `reset()` is called within `abort()` - calledBy.reset = true; - bench.abort(); - delete calledBy.reset; - return bench; - } - var event, - index = 0, - changes = { 'length': 0 }, - queue = { 'length': 0 }; - - // a non-recursive solution to check if properties have changed - // http://www.jslab.dk/articles/non.recursive.preorder.traversal.part4 - var data = { - 'destination': bench, - 'source': _.assign({}, cloneDeep(bench.constructor.prototype), cloneDeep(bench.options)) - }; - - do { - _.forOwn(data.source, function(value, key) { - var changed, - destination = data.destination, - currValue = destination[key]; - - // skip pseudo private properties like `_timerId` which could be a - // Java object in environments like RingoJS - if (key.charAt(0) == '_') { - return; - } - if (value && typeof value == 'object') { - if (_.isArray(value)) { - // check if an array value has changed to a non-array value - if (!_.isArray(currValue)) { - changed = currValue = []; - } - // or has changed its length - if (currValue.length != value.length) { - changed = currValue = currValue.slice(0, value.length); - currValue.length = value.length; - } - } - // check if an object has changed to a non-object value - else if (!currValue || typeof currValue != 'object') { - changed = currValue = {}; - } - // register a changed object - if (changed) { - changes[changes.length++] = { 'destination': destination, 'key': key, 'value': currValue }; - } - queue[queue.length++] = { 'destination': currValue, 'source': value }; - } - // register a changed primitive - else if (value !== currValue && !(value == null || _.isFunction(value))) { - changes[changes.length++] = { 'destination': destination, 'key': key, 'value': value }; - } - }); - } - while ((data = queue[index++])); - - // if changed emit the `reset` event and if it isn't cancelled reset the benchmark - if (changes.length && (bench.emit(event = Event('reset')), !event.cancelled)) { - _.each(changes, function(data) { - data.destination[data.key] = data.value; - }); - } - return bench; - } - - /** - * Displays relevant benchmark information when coerced to a string. - * - * @name toString - * @memberOf Benchmark - * @returns {string} A string representation of the benchmark instance. - */ - function toStringBench() { - var bench = this, - error = bench.error, - hz = bench.hz, - id = bench.id, - stats = bench.stats, - size = stats.sample.length, - pm = support.java ? '+/-' : '\xb1', - result = bench.name || (_.isNaN(id) ? id : ''); - - if (error) { - result += ': ' + join(error); - } else { - result += ' x ' + formatNumber(hz.toFixed(hz < 100 ? 2 : 0)) + ' ops/sec ' + pm + - stats.rme.toFixed(2) + '% (' + size + ' run' + (size == 1 ? '' : 's') + ' sampled)'; - } - return result; - } - - /*------------------------------------------------------------------------*/ - - /** - * Clocks the time taken to execute a test per cycle (secs). - * - * @private - * @param {Object} bench The benchmark instance. - * @returns {number} The time taken. - */ - function clock() { - var applet, - options = Benchmark.options, - templateData = {}, - timers = [{ 'ns': timer.ns, 'res': max(0.0015, getRes('ms')), 'unit': 'ms' }]; - - // lazy define for hi-res timers - clock = function(clone) { - var deferred; - - if (clone instanceof Deferred) { - deferred = clone; - clone = deferred.benchmark; - } - var bench = clone._original, - stringable = isStringable(bench.fn), - count = bench.count = clone.count, - decompilable = stringable || (support.decompilation && (clone.setup !== _.noop || clone.teardown !== _.noop)), - id = bench.id, - name = bench.name || (typeof id == 'number' ? '' : id), - result = 0; - - // init `minTime` if needed - clone.minTime = bench.minTime || (bench.minTime = bench.options.minTime = options.minTime); - - // repair nanosecond timer - // (some Chrome builds erase the `ns` variable after millions of executions) - if (applet) { - try { - timer.ns.nanoTime(); - } catch(e) { - // use non-element to avoid issues with libs that augment them - timer.ns = new applet.Packages.nano; - } - } - // Compile in setup/teardown functions and the test loop. - // Create a new compiled test, instead of using the cached `bench.compiled`, - // to avoid potential engine optimizations enabled over the life of the test. - var funcBody = deferred - ? 'var d#=this,${fnArg}=d#,m#=d#.benchmark._original,f#=m#.fn,su#=m#.setup,td#=m#.teardown;' + - // when `deferred.cycles` is `0` then... - 'if(!d#.cycles){' + - // set `deferred.fn` - 'd#.fn=function(){var ${fnArg}=d#;if(typeof f#=="function"){try{${fn}\n}catch(e#){f#(d#)}}else{${fn}\n}};' + - // set `deferred.teardown` - 'd#.teardown=function(){d#.cycles=0;if(typeof td#=="function"){try{${teardown}\n}catch(e#){td#()}}else{${teardown}\n}};' + - // execute the benchmark's `setup` - 'if(typeof su#=="function"){try{${setup}\n}catch(e#){su#()}}else{${setup}\n};' + - // start timer - 't#.start(d#);' + - // execute `deferred.fn` and return a dummy object - '}d#.fn();return{uid:"${uid}"}' - - : 'var r#,s#,m#=this,f#=m#.fn,i#=m#.count,n#=t#.ns;${setup}\n${begin};' + - 'while(i#--){${fn}\n}${end};${teardown}\nreturn{elapsed:r#,uid:"${uid}"}'; - - var compiled = bench.compiled = clone.compiled = createCompiled(bench, decompilable, deferred, funcBody), - isEmpty = !(templateData.fn || stringable); - - try { - if (isEmpty) { - // Firefox may remove dead code from `Function#toString` results - // http://bugzil.la/536085 - throw new Error('The test "' + name + '" is empty. This may be the result of dead code removal.'); - } - else if (!deferred) { - // pretest to determine if compiled code exits early, usually by a - // rogue `return` statement, by checking for a return object with the uid - bench.count = 1; - compiled = decompilable && (compiled.call(bench, context, timer) || {}).uid == templateData.uid && compiled; - bench.count = count; - } - } catch(e) { - compiled = null; - clone.error = e || new Error(String(e)); - bench.count = count; - } - // fallback when a test exits early or errors during pretest - if (!compiled && !deferred && !isEmpty) { - funcBody = ( - stringable || (decompilable && !clone.error) - ? 'function f#(){${fn}\n}var r#,s#,m#=this,i#=m#.count' - : 'var r#,s#,m#=this,f#=m#.fn,i#=m#.count' - ) + - ',n#=t#.ns;${setup}\n${begin};m#.f#=f#;while(i#--){m#.f#()}${end};' + - 'delete m#.f#;${teardown}\nreturn{elapsed:r#}'; - - compiled = createCompiled(bench, decompilable, deferred, funcBody); - - try { - // pretest one more time to check for errors - bench.count = 1; - compiled.call(bench, context, timer); - bench.count = count; - delete clone.error; - } - catch(e) { - bench.count = count; - if (!clone.error) { - clone.error = e || new Error(String(e)); - } - } - } - // if no errors run the full test loop - if (!clone.error) { - compiled = bench.compiled = clone.compiled = createCompiled(bench, decompilable, deferred, funcBody); - result = compiled.call(deferred || bench, context, timer).elapsed; - } - return result; - }; - - /*----------------------------------------------------------------------*/ - - /** - * Creates a compiled function from the given function `body`. - */ - function createCompiled(bench, decompilable, deferred, body) { - var fn = bench.fn, - fnArg = deferred ? getFirstArgument(fn) || 'deferred' : ''; - - templateData.uid = uid + uidCounter++; - - _.assign(templateData, { - 'setup': decompilable ? getSource(bench.setup) : interpolate('m#.setup()'), - 'fn': decompilable ? getSource(fn) : interpolate('m#.fn(' + fnArg + ')'), - 'fnArg': fnArg, - 'teardown': decompilable ? getSource(bench.teardown) : interpolate('m#.teardown()') - }); - - // use API of chosen timer - if (timer.unit == 'ns') { - if (timer.ns.nanoTime) { - _.assign(templateData, { - 'begin': interpolate('s#=n#.nanoTime()'), - 'end': interpolate('r#=(n#.nanoTime()-s#)/1e9') - }); - } else { - _.assign(templateData, { - 'begin': interpolate('s#=n#()'), - 'end': interpolate('r#=n#(s#);r#=r#[0]+(r#[1]/1e9)') - }); - } - } - else if (timer.unit == 'us') { - if (timer.ns.stop) { - _.assign(templateData, { - 'begin': interpolate('s#=n#.start()'), - 'end': interpolate('r#=n#.microseconds()/1e6') - }); - } else { - _.assign(templateData, { - 'begin': interpolate('s#=n#()'), - 'end': interpolate('r#=(n#()-s#)/1e6') - }); - } - } - else if (timer.ns.now) { - _.assign(templateData, { - 'begin': interpolate('s#=n#.now()'), - 'end': interpolate('r#=(n#.now()-s#)/1e3') - }); - } - else { - _.assign(templateData, { - 'begin': interpolate('s#=new n#().getTime()'), - 'end': interpolate('r#=(new n#().getTime()-s#)/1e3') - }); - } - // define `timer` methods - timer.start = createFunction( - interpolate('o#'), - interpolate('var n#=this.ns,${begin};o#.elapsed=0;o#.timeStamp=s#') - ); - - timer.stop = createFunction( - interpolate('o#'), - interpolate('var n#=this.ns,s#=o#.timeStamp,${end};o#.elapsed=r#') - ); - - // create compiled test - return createFunction( - interpolate('window,t#'), - 'var global = window, clearTimeout = global.clearTimeout, setTimeout = global.setTimeout;\n' + - interpolate(body) - ); - } - - /** - * Gets the current timer's minimum resolution (secs). - */ - function getRes(unit) { - var measured, - begin, - count = 30, - divisor = 1e3, - ns = timer.ns, - sample = []; - - // get average smallest measurable time - while (count--) { - if (unit == 'us') { - divisor = 1e6; - if (ns.stop) { - ns.start(); - while (!(measured = ns.microseconds())) {} - } else { - begin = ns(); - while (!(measured = ns() - begin)) {} - } - } - else if (unit == 'ns') { - divisor = 1e9; - if (ns.nanoTime) { - begin = ns.nanoTime(); - while (!(measured = ns.nanoTime() - begin)) {} - } else { - begin = (begin = ns())[0] + (begin[1] / divisor); - while (!(measured = ((measured = ns())[0] + (measured[1] / divisor)) - begin)) {} - divisor = 1; - } - } - else if (ns.now) { - begin = ns.now(); - while (!(measured = ns.now() - begin)) {} - } - else { - begin = new ns().getTime(); - while (!(measured = new ns().getTime() - begin)) {} - } - // check for broken timers (`nanoTime` may have issues) - // http://alivebutsleepy.srnet.cz/unreliable-system-nanotime/ - if (measured > 0) { - sample.push(measured); - } else { - sample.push(Infinity); - break; - } - } - // convert to seconds - return getMean(sample) / divisor; - } - - /** - * Interpolates a given template string. - */ - function interpolate(string) { - // replaces all occurrences of `#` with a unique number and template tokens with content - return _.template(string.replace(/\#/g, /\d+/.exec(templateData.uid)))(templateData); - } - - /*----------------------------------------------------------------------*/ - - // detect nanosecond support from a Java applet - _.each(doc && doc.applets || [], function(element) { - return !(timer.ns = applet = 'nanoTime' in element && element); - }); - - // check type in case Safari returns an object instead of a number - try { - if (typeof timer.ns.nanoTime() == 'number') { - timers.push({ 'ns': timer.ns, 'res': getRes('ns'), 'unit': 'ns' }); - } - } catch(e) {} - - // detect Chrome's microsecond timer: - // enable benchmarking via the --enable-benchmarking command - // line switch in at least Chrome 7 to use chrome.Interval - try { - if ((timer.ns = new (context.chrome || context.chromium).Interval)) { - timers.push({ 'ns': timer.ns, 'res': getRes('us'), 'unit': 'us' }); - } - } catch(e) {} - - // detect Node.js's nanosecond resolution timer available in Node.js >= 0.8 - if (processObject && typeof (timer.ns = processObject.hrtime) == 'function') { - timers.push({ 'ns': timer.ns, 'res': getRes('ns'), 'unit': 'ns' }); - } - // detect Wade Simmons' Node.js `microtime` module - if (microtimeObject && typeof (timer.ns = microtimeObject.now) == 'function') { - timers.push({ 'ns': timer.ns, 'res': getRes('us'), 'unit': 'us' }); - } - // pick timer with highest resolution - timer = _.min(timers, 'res'); - - // remove unused applet - if (timer.unit != 'ns' && applet) { - applet = destroyElement(applet); - } - // error if there are no working timers - if (timer.res == Infinity) { - throw new Error('Benchmark.js was unable to find a working timer.'); - } - // resolve time span required to achieve a percent uncertainty of at most 1% - // http://spiff.rit.edu/classes/phys273/uncert/uncert.html - options.minTime || (options.minTime = max(timer.res / 2 / 0.01, 0.05)); - return clock.apply(null, arguments); - } - - /*------------------------------------------------------------------------*/ - - /** - * Computes stats on benchmark results. - * - * @private - * @param {Object} bench The benchmark instance. - * @param {Object} options The options object. - */ - function compute(bench, options) { - options || (options = {}); - - var async = options.async, - elapsed = 0, - initCount = bench.initCount, - minSamples = bench.minSamples, - queue = [], - sample = bench.stats.sample; - - /** - * Adds a clone to the queue. - */ - function enqueue() { - queue.push(bench.clone({ - '_original': bench, - 'events': { - 'abort': [update], - 'cycle': [update], - 'error': [update], - 'start': [update] - } - })); - } - - /** - * Updates the clone/original benchmarks to keep their data in sync. - */ - function update(event) { - var clone = this, - type = event.type; - - if (bench.running) { - if (type == 'start') { - // Note: `clone.minTime` prop is inited in `clock()` - clone.count = bench.initCount; - } - else { - if (type == 'error') { - bench.error = clone.error; - } - if (type == 'abort') { - bench.abort(); - bench.emit('cycle'); - } else { - event.currentTarget = event.target = bench; - bench.emit(event); - } - } - } else if (bench.aborted) { - // clear abort listeners to avoid triggering bench's abort/cycle again - clone.events.abort.length = 0; - clone.abort(); - } - } - - /** - * Determines if more clones should be queued or if cycling should stop. - */ - function evaluate(event) { - var critical, - df, - mean, - moe, - rme, - sd, - sem, - variance, - clone = event.target, - done = bench.aborted, - now = _.now(), - size = sample.push(clone.times.period), - maxedOut = size >= minSamples && (elapsed += now - clone.times.timeStamp) / 1e3 > bench.maxTime, - times = bench.times, - varOf = function(sum, x) { return sum + pow(x - mean, 2); }; - - // exit early for aborted or unclockable tests - if (done || clone.hz == Infinity) { - maxedOut = !(size = sample.length = queue.length = 0); - } - - if (!done) { - // sample mean (estimate of the population mean) - mean = getMean(sample); - // sample variance (estimate of the population variance) - variance = _.reduce(sample, varOf, 0) / (size - 1) || 0; - // sample standard deviation (estimate of the population standard deviation) - sd = sqrt(variance); - // standard error of the mean (a.k.a. the standard deviation of the sampling distribution of the sample mean) - sem = sd / sqrt(size); - // degrees of freedom - df = size - 1; - // critical value - critical = tTable[Math.round(df) || 1] || tTable.infinity; - // margin of error - moe = sem * critical; - // relative margin of error - rme = (moe / mean) * 100 || 0; - - _.assign(bench.stats, { - 'deviation': sd, - 'mean': mean, - 'moe': moe, - 'rme': rme, - 'sem': sem, - 'variance': variance - }); - - // Abort the cycle loop when the minimum sample size has been collected - // and the elapsed time exceeds the maximum time allowed per benchmark. - // We don't count cycle delays toward the max time because delays may be - // increased by browsers that clamp timeouts for inactive tabs. - // https://developer.mozilla.org/en/window.setTimeout#Inactive_tabs - if (maxedOut) { - // reset the `initCount` in case the benchmark is rerun - bench.initCount = initCount; - bench.running = false; - done = true; - times.elapsed = (now - times.timeStamp) / 1e3; - } - if (bench.hz != Infinity) { - bench.hz = 1 / mean; - times.cycle = mean * bench.count; - times.period = mean; - } - } - // if time permits, increase sample size to reduce the margin of error - if (queue.length < 2 && !maxedOut) { - enqueue(); - } - // abort the `invoke` cycle when done - event.aborted = done; - } - - // init queue and begin - enqueue(); - invoke(queue, { - 'name': 'run', - 'args': { 'async': async }, - 'queued': true, - 'onCycle': evaluate, - 'onComplete': function() { bench.emit('complete'); } - }); - } - - /*------------------------------------------------------------------------*/ - - /** - * Cycles a benchmark until a run `count` can be established. - * - * @private - * @param {Object} clone The cloned benchmark instance. - * @param {Object} options The options object. - */ - function cycle(clone, options) { - options || (options = {}); - - var deferred; - if (clone instanceof Deferred) { - deferred = clone; - clone = clone.benchmark; - } - - var clocked, - cycles, - divisor, - event, - minTime, - period, - async = options.async, - bench = clone._original, - count = clone.count, - times = clone.times; - - // continue, if not aborted between cycles - if (clone.running) { - // `minTime` is set to `Benchmark.options.minTime` in `clock()` - cycles = ++clone.cycles; - clocked = deferred ? deferred.elapsed : clock(clone); - minTime = clone.minTime; - - if (cycles > bench.cycles) { - bench.cycles = cycles; - } - if (clone.error) { - event = Event('error'); - event.message = clone.error; - clone.emit(event); - if (!event.cancelled) { - clone.abort(); - } - } - } - - // continue, if not errored - if (clone.running) { - // time taken to complete last test cycle - bench.times.cycle = times.cycle = clocked; - // seconds per operation - period = bench.times.period = times.period = clocked / count; - // ops per second - bench.hz = clone.hz = 1 / period; - // avoid working our way up to this next time - bench.initCount = clone.initCount = count; - // do we need to do another cycle? - clone.running = clocked < minTime; - - if (clone.running) { - // tests may clock at `0` when `initCount` is a small number, - // to avoid that we set its count to something a bit higher - if (!clocked && (divisor = divisors[clone.cycles]) != null) { - count = floor(4e6 / divisor); - } - // calculate how many more iterations it will take to achive the `minTime` - if (count <= clone.count) { - count += Math.ceil((minTime - clocked) / period); - } - clone.running = count != Infinity; - } - } - // should we exit early? - event = Event('cycle'); - clone.emit(event); - if (event.aborted) { - clone.abort(); - } - // figure out what to do next - if (clone.running) { - // start a new cycle - clone.count = count; - if (deferred) { - clone.compiled.call(deferred, context, timer); - } else if (async) { - delay(clone, function() { cycle(clone, options); }); - } else { - cycle(clone); - } - } - else { - // fix TraceMonkey bug associated with clock fallbacks - // http://bugzil.la/509069 - if (support.browser) { - runScript(uid + '=1;delete ' + uid); - } - // done - clone.emit('complete'); - } - } - - /*------------------------------------------------------------------------*/ - - /** - * Runs the benchmark. - * - * @memberOf Benchmark - * @param {Object} [options={}] Options object. - * @returns {Object} The benchmark instance. - * @example - * - * // basic usage - * bench.run(); - * - * // or with options - * bench.run({ 'async': true }); - */ - function run(options) { - var bench = this, - event = Event('start'); - - // set `running` to `false` so `reset()` won't call `abort()` - bench.running = false; - bench.reset(); - bench.running = true; - - bench.count = bench.initCount; - bench.times.timeStamp = _.now(); - bench.emit(event); - - if (!event.cancelled) { - options = { 'async': ((options = options && options.async) == null ? bench.async : options) && support.timeout }; - - // for clones created within `compute()` - if (bench._original) { - if (bench.defer) { - Deferred(bench); - } else { - cycle(bench, options); - } - } - // for original benchmarks - else { - compute(bench, options); - } - } - return bench; - } - - /*------------------------------------------------------------------------*/ - - // Firefox 1 erroneously defines variable and argument names of functions on - // the function itself as non-configurable properties with `undefined` values. - // The bugginess continues as the `Benchmark` constructor has an argument - // named `options` and Firefox 1 will not assign a value to `Benchmark.options`, - // making it non-writable in the process, unless it is the first property - // assigned by for-in loop of `_.assign()`. - _.assign(Benchmark, { - - /** - * The default options copied by benchmark instances. - * - * @static - * @memberOf Benchmark - * @type Object - */ - 'options': { - - /** - * A flag to indicate that benchmark cycles will execute asynchronously - * by default. - * - * @memberOf Benchmark.options - * @type boolean - */ - 'async': false, - - /** - * A flag to indicate that the benchmark clock is deferred. - * - * @memberOf Benchmark.options - * @type boolean - */ - 'defer': false, - - /** - * The delay between test cycles (secs). - * @memberOf Benchmark.options - * @type number - */ - 'delay': 0.005, - - /** - * Displayed by `Benchmark#toString` when a `name` is not available - * (auto-generated if absent). - * - * @memberOf Benchmark.options - * @type string - */ - 'id': undefined, - - /** - * The default number of times to execute a test on a benchmark's first cycle. - * - * @memberOf Benchmark.options - * @type number - */ - 'initCount': 1, - - /** - * The maximum time a benchmark is allowed to run before finishing (secs). - * - * Note: Cycle delays aren't counted toward the maximum time. - * - * @memberOf Benchmark.options - * @type number - */ - 'maxTime': 5, - - /** - * The minimum sample size required to perform statistical analysis. - * - * @memberOf Benchmark.options - * @type number - */ - 'minSamples': 5, - - /** - * The time needed to reduce the percent uncertainty of measurement to 1% (secs). - * - * @memberOf Benchmark.options - * @type number - */ - 'minTime': 0, - - /** - * The name of the benchmark. - * - * @memberOf Benchmark.options - * @type string - */ - 'name': undefined, - - /** - * An event listener called when the benchmark is aborted. - * - * @memberOf Benchmark.options - * @type Function - */ - 'onAbort': undefined, - - /** - * An event listener called when the benchmark completes running. - * - * @memberOf Benchmark.options - * @type Function - */ - 'onComplete': undefined, - - /** - * An event listener called after each run cycle. - * - * @memberOf Benchmark.options - * @type Function - */ - 'onCycle': undefined, - - /** - * An event listener called when a test errors. - * - * @memberOf Benchmark.options - * @type Function - */ - 'onError': undefined, - - /** - * An event listener called when the benchmark is reset. - * - * @memberOf Benchmark.options - * @type Function - */ - 'onReset': undefined, - - /** - * An event listener called when the benchmark starts running. - * - * @memberOf Benchmark.options - * @type Function - */ - 'onStart': undefined - }, - - /** - * Platform object with properties describing things like browser name, - * version, and operating system. See [`platform.js`](http://mths.be/platform). - * - * @static - * @memberOf Benchmark - * @type Object - */ - 'platform': context.platform || req('platform') || ({ - 'description': context.navigator && context.navigator.userAgent || null, - 'layout': null, - 'product': null, - 'name': null, - 'manufacturer': null, - 'os': null, - 'prerelease': null, - 'version': null, - 'toString': function() { - return this.description || ''; - } - }), - - /** - * The semantic version number. - * - * @static - * @memberOf Benchmark - * @type string - */ - 'version': '1.0.0' - }); - - _.assign(Benchmark, { - 'filter': filter, - 'formatNumber': formatNumber, - 'invoke': invoke, - 'join': join, - 'runInContext': runInContext, - 'support': support - }); - - // Add Lo-Dash methods to Benchmark - _.each(['each', 'forEach', 'forOwn', 'has', 'indexOf', 'map', 'pluck', 'reduce'], function(methodName) { - Benchmark[methodName] = _[methodName]; - }); - - /*------------------------------------------------------------------------*/ - - _.assign(Benchmark.prototype, { - - /** - * The number of times a test was executed. - * - * @memberOf Benchmark - * @type number - */ - 'count': 0, - - /** - * The number of cycles performed while benchmarking. - * - * @memberOf Benchmark - * @type number - */ - 'cycles': 0, - - /** - * The number of executions per second. - * - * @memberOf Benchmark - * @type number - */ - 'hz': 0, - - /** - * The compiled test function. - * - * @memberOf Benchmark - * @type {Function|string} - */ - 'compiled': undefined, - - /** - * The error object if the test failed. - * - * @memberOf Benchmark - * @type Object - */ - 'error': undefined, - - /** - * The test to benchmark. - * - * @memberOf Benchmark - * @type {Function|string} - */ - 'fn': undefined, - - /** - * A flag to indicate if the benchmark is aborted. - * - * @memberOf Benchmark - * @type boolean - */ - 'aborted': false, - - /** - * A flag to indicate if the benchmark is running. - * - * @memberOf Benchmark - * @type boolean - */ - 'running': false, - - /** - * Compiled into the test and executed immediately **before** the test loop. - * - * @memberOf Benchmark - * @type {Function|string} - * @example - * - * // basic usage - * var bench = Benchmark({ - * 'setup': function() { - * var c = this.count, - * element = document.getElementById('container'); - * while (c--) { - * element.appendChild(document.createElement('div')); - * } - * }, - * 'fn': function() { - * element.removeChild(element.lastChild); - * } - * }); - * - * // compiles to something like: - * var c = this.count, - * element = document.getElementById('container'); - * while (c--) { - * element.appendChild(document.createElement('div')); - * } - * var start = new Date; - * while (count--) { - * element.removeChild(element.lastChild); - * } - * var end = new Date - start; - * - * // or using strings - * var bench = Benchmark({ - * 'setup': '\ - * var a = 0;\n\ - * (function() {\n\ - * (function() {\n\ - * (function() {', - * 'fn': 'a += 1;', - * 'teardown': '\ - * }())\n\ - * }())\n\ - * }())' - * }); - * - * // compiles to something like: - * var a = 0; - * (function() { - * (function() { - * (function() { - * var start = new Date; - * while (count--) { - * a += 1; - * } - * var end = new Date - start; - * }()) - * }()) - * }()) - */ - 'setup': _.noop, - - /** - * Compiled into the test and executed immediately **after** the test loop. - * - * @memberOf Benchmark - * @type {Function|string} - */ - 'teardown': _.noop, - - /** - * An object of stats including mean, margin or error, and standard deviation. - * - * @memberOf Benchmark - * @type Object - */ - 'stats': { - - /** - * The margin of error. - * - * @memberOf Benchmark#stats - * @type number - */ - 'moe': 0, - - /** - * The relative margin of error (expressed as a percentage of the mean). - * - * @memberOf Benchmark#stats - * @type number - */ - 'rme': 0, - - /** - * The standard error of the mean. - * - * @memberOf Benchmark#stats - * @type number - */ - 'sem': 0, - - /** - * The sample standard deviation. - * - * @memberOf Benchmark#stats - * @type number - */ - 'deviation': 0, - - /** - * The sample arithmetic mean (secs). - * - * @memberOf Benchmark#stats - * @type number - */ - 'mean': 0, - - /** - * The array of sampled periods. - * - * @memberOf Benchmark#stats - * @type Array - */ - 'sample': [], - - /** - * The sample variance. - * - * @memberOf Benchmark#stats - * @type number - */ - 'variance': 0 - }, - - /** - * An object of timing data including cycle, elapsed, period, start, and stop. - * - * @memberOf Benchmark - * @type Object - */ - 'times': { - - /** - * The time taken to complete the last cycle (secs). - * - * @memberOf Benchmark#times - * @type number - */ - 'cycle': 0, - - /** - * The time taken to complete the benchmark (secs). - * - * @memberOf Benchmark#times - * @type number - */ - 'elapsed': 0, - - /** - * The time taken to execute the test once (secs). - * - * @memberOf Benchmark#times - * @type number - */ - 'period': 0, - - /** - * A timestamp of when the benchmark started (ms). - * - * @memberOf Benchmark#times - * @type number - */ - 'timeStamp': 0 - } - }); - - _.assign(Benchmark.prototype, { - 'abort': abort, - 'clone': clone, - 'compare': compare, - 'emit': emit, - 'listeners': listeners, - 'off': off, - 'on': on, - 'reset': reset, - 'run': run, - 'toString': toStringBench - }); - - /*------------------------------------------------------------------------*/ - - _.assign(Deferred.prototype, { - - /** - * The deferred benchmark instance. - * - * @memberOf Benchmark.Deferred - * @type Object - */ - 'benchmark': null, - - /** - * The number of deferred cycles performed while benchmarking. - * - * @memberOf Benchmark.Deferred - * @type number - */ - 'cycles': 0, - - /** - * The time taken to complete the deferred benchmark (secs). - * - * @memberOf Benchmark.Deferred - * @type number - */ - 'elapsed': 0, - - /** - * A timestamp of when the deferred benchmark started (ms). - * - * @memberOf Benchmark.Deferred - * @type number - */ - 'timeStamp': 0 - }); - - _.assign(Deferred.prototype, { - 'resolve': resolve - }); - - /*------------------------------------------------------------------------*/ - - _.assign(Event.prototype, { - - /** - * A flag to indicate if the emitters listener iteration is aborted. - * - * @memberOf Benchmark.Event - * @type boolean - */ - 'aborted': false, - - /** - * A flag to indicate if the default action is cancelled. - * - * @memberOf Benchmark.Event - * @type boolean - */ - 'cancelled': false, - - /** - * The object whose listeners are currently being processed. - * - * @memberOf Benchmark.Event - * @type Object - */ - 'currentTarget': undefined, - - /** - * The return value of the last executed listener. - * - * @memberOf Benchmark.Event - * @type Mixed - */ - 'result': undefined, - - /** - * The object to which the event was originally emitted. - * - * @memberOf Benchmark.Event - * @type Object - */ - 'target': undefined, - - /** - * A timestamp of when the event was created (ms). - * - * @memberOf Benchmark.Event - * @type number - */ - 'timeStamp': 0, - - /** - * The event type. - * - * @memberOf Benchmark.Event - * @type string - */ - 'type': '' - }); - - /*------------------------------------------------------------------------*/ - - /** - * The default options copied by suite instances. - * - * @static - * @memberOf Benchmark.Suite - * @type Object - */ - Suite.options = { - - /** - * The name of the suite. - * - * @memberOf Benchmark.Suite.options - * @type string - */ - 'name': undefined - }; - - /*------------------------------------------------------------------------*/ - - _.assign(Suite.prototype, { - - /** - * The number of benchmarks in the suite. - * - * @memberOf Benchmark.Suite - * @type number - */ - 'length': 0, - - /** - * A flag to indicate if the suite is aborted. - * - * @memberOf Benchmark.Suite - * @type boolean - */ - 'aborted': false, - - /** - * A flag to indicate if the suite is running. - * - * @memberOf Benchmark.Suite - * @type boolean - */ - 'running': false - }); - - _.assign(Suite.prototype, { - 'abort': abortSuite, - 'add': add, - 'clone': cloneSuite, - 'emit': emit, - 'filter': filterSuite, - 'join': arrayRef.join, - 'listeners': listeners, - 'off': off, - 'on': on, - 'pop': arrayRef.pop, - 'push': push, - 'reset': resetSuite, - 'run': runSuite, - 'reverse': arrayRef.reverse, - 'shift': shift, - 'slice': slice, - 'sort': arrayRef.sort, - 'splice': arrayRef.splice, - 'unshift': unshift - }); - - /*------------------------------------------------------------------------*/ - - // expose Deferred, Event, and Suite - _.assign(Benchmark, { - 'Deferred': Deferred, - 'Event': Event, - 'Suite': Suite - }); - - /*------------------------------------------------------------------------*/ - - // add Lo-Dash methods as Suite methods - _.each(['each', 'forEach', 'indexOf', 'map', 'pluck', 'reduce'], function(methodName) { - var func = _[methodName]; - Suite.prototype[methodName] = function() { - var args = [this]; - push.apply(args, arguments); - return func.apply(_, args); - }; - }); - - // avoid array-like object bugs with `Array#shift` and `Array#splice` - // in Firefox < 10 and IE < 9 - if (!_.support.spliceObjects) { - _.each(['pop', 'shift', 'splice'], function(methodName) { - var func = arrayRef[methodName]; - - Suite.prototype[methodName] = function() { - var value = this, - result = func.apply(value, arguments); - - if (value.length === 0) { - delete value[0]; - } - return result; - }; - }); - } - // avoid buggy `Array#unshift` in IE < 8 which doesn't return the new - // length of the array - if (!support.unshiftResult) { - Suite.prototype.unshift = function() { - var value = this; - unshift.apply(value, arguments); - return value.length; - }; - } - return Benchmark; - } - - /*--------------------------------------------------------------------------*/ - - // export Benchmark - // some AMD build optimizers, like r.js, check for condition patterns like the following: - if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) { - // define as an anonymous module so, through path mapping, it can be aliased - define(['lodash', 'platform'], function(_, platform) { - return runInContext({ - '_': _, - 'platform': platform - }); - }); - } - else { - var Benchmark = runInContext(); - - // check for `exports` after `define` in case a build optimizer adds an `exports` object - if (freeExports && freeModule) { - // in Node.js or RingoJS - if (moduleExports) { - (freeModule.exports = Benchmark).Benchmark = Benchmark; - } - // in Narwhal or Rhino -require - else { - freeExports.Benchmark = Benchmark; - } - } - else { - // in a browser or Rhino - root.Benchmark = Benchmark; - } - } -}.call(this)); diff --git a/test/lib/benchmark.js/index.js b/test/lib/benchmark.js/index.js deleted file mode 100644 index 4149844..0000000 --- a/test/lib/benchmark.js/index.js +++ /dev/null @@ -1 +0,0 @@ -module.exports = require('./benchmark'); \ No newline at end of file diff --git a/test/lib/benchmark.js/nano.jar b/test/lib/benchmark.js/nano.jar deleted file mode 100644 index b577840..0000000 Binary files a/test/lib/benchmark.js/nano.jar and /dev/null differ diff --git a/test/lib/benchmark.js/nano.java b/test/lib/benchmark.js/nano.java deleted file mode 100644 index 96fc224..0000000 --- a/test/lib/benchmark.js/nano.java +++ /dev/null @@ -1,23 +0,0 @@ -/** - * Simple class to expose nanoTime() to JavaScript. - * - * Compile using - * javac -g:none -target 1.5 nano.java - * jar cfM nano.jar nano.class - * java -jar proguard.jar @options.txt - * - * ProGuard (http://proguard.sourceforge.net) - * options.txt - * -injars nano.jar - * -outjars nano_s.jar - * -libraryjars /jre/lib/rt.jar - * -keep public class nano { - * public long nanoTime(); - * } - */ -import java.applet.Applet; -public class nano extends Applet { - public long nanoTime() { - return System.nanoTime(); - } -} diff --git a/test/lib/benchmark.js/package.json b/test/lib/benchmark.js/package.json deleted file mode 100644 index d37459f..0000000 --- a/test/lib/benchmark.js/package.json +++ /dev/null @@ -1,30 +0,0 @@ -{ - "name": "benchmark", - "version": "1.0.0", - "description": "A benchmarking library that works on nearly all JavaScript platforms, supports high-resolution timers, & returns statistically significant results.", - "homepage": "http://benchmarkjs.com/", - "license": "MIT", - "main": "benchmark.js", - "keywords": ["benchmark", "performance", "speed"], - "author": "Mathias Bynens (http://mathiasbynens.be/)", - "contributors": [ - "Mathias Bynens (http://mathiasbynens.be/)", - "John-David Dalton (http://allyoucanleet.com/)", - "Kit Cambridge (http://kitcambridge.be/)" - ], - "bugs": "https://github.com/bestiejs/benchmark.js/issues", - "repository": "bestiejs/benchmark.js", - "scripts": { "test": "echo \"See the repository CONTRIBUTING.md for testing instructions.\"" }, - "dependencies": { - "lodash": "~2.4.1", - "platform": "~1.1.0" - }, - "engines": [ - "node", - "rhino" - ], - "files": [ - "LICENSE.txt", - "benchmark.js" - ] -} diff --git a/test/lib/benchmark.js/vendor/lodash/LICENSE.txt b/test/lib/benchmark.js/vendor/lodash/LICENSE.txt deleted file mode 100644 index 49869bb..0000000 --- a/test/lib/benchmark.js/vendor/lodash/LICENSE.txt +++ /dev/null @@ -1,22 +0,0 @@ -Copyright 2012-2013 The Dojo Foundation -Based on Underscore.js 1.5.2, copyright 2009-2013 Jeremy Ashkenas, -DocumentCloud and Investigative Reporters & Editors - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be -included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE -LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. \ No newline at end of file diff --git a/test/lib/benchmark.js/vendor/lodash/dist/lodash.compat.js b/test/lib/benchmark.js/vendor/lodash/dist/lodash.compat.js deleted file mode 100644 index 23798ba..0000000 --- a/test/lib/benchmark.js/vendor/lodash/dist/lodash.compat.js +++ /dev/null @@ -1,7157 +0,0 @@ -/** - * @license - * Lo-Dash 2.4.1 (Custom Build) - * Build: `lodash -o ./dist/lodash.compat.js` - * Copyright 2012-2013 The Dojo Foundation - * Based on Underscore.js 1.5.2 - * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors - * Available under MIT license - */ -;(function() { - - /** Used as a safe reference for `undefined` in pre ES5 environments */ - var undefined; - - /** Used to pool arrays and objects used internally */ - var arrayPool = [], - objectPool = []; - - /** Used to generate unique IDs */ - var idCounter = 0; - - /** Used internally to indicate various things */ - var indicatorObject = {}; - - /** Used to prefix keys to avoid issues with `__proto__` and properties on `Object.prototype` */ - var keyPrefix = +new Date + ''; - - /** Used as the size when optimizations are enabled for large arrays */ - var largeArraySize = 75; - - /** Used as the max size of the `arrayPool` and `objectPool` */ - var maxPoolSize = 40; - - /** Used to detect and test whitespace */ - var whitespace = ( - // whitespace - ' \t\x0B\f\xA0\ufeff' + - - // line terminators - '\n\r\u2028\u2029' + - - // unicode category "Zs" space separators - '\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000' - ); - - /** Used to match empty string literals in compiled template source */ - var reEmptyStringLeading = /\b__p \+= '';/g, - reEmptyStringMiddle = /\b(__p \+=) '' \+/g, - reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g; - - /** - * Used to match ES6 template delimiters - * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-literals-string-literals - */ - var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g; - - /** Used to match regexp flags from their coerced string values */ - var reFlags = /\w*$/; - - /** Used to detected named functions */ - var reFuncName = /^\s*function[ \n\r\t]+\w/; - - /** Used to match "interpolate" template delimiters */ - var reInterpolate = /<%=([\s\S]+?)%>/g; - - /** Used to match leading whitespace and zeros to be removed */ - var reLeadingSpacesAndZeros = RegExp('^[' + whitespace + ']*0+(?=.$)'); - - /** Used to ensure capturing order of template delimiters */ - var reNoMatch = /($^)/; - - /** Used to detect functions containing a `this` reference */ - var reThis = /\bthis\b/; - - /** Used to match unescaped characters in compiled string literals */ - var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g; - - /** Used to assign default `context` object properties */ - var contextProps = [ - 'Array', 'Boolean', 'Date', 'Error', 'Function', 'Math', 'Number', 'Object', - 'RegExp', 'String', '_', 'attachEvent', 'clearTimeout', 'isFinite', 'isNaN', - 'parseInt', 'setTimeout' - ]; - - /** Used to fix the JScript [[DontEnum]] bug */ - var shadowedProps = [ - 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', - 'toLocaleString', 'toString', 'valueOf' - ]; - - /** Used to make template sourceURLs easier to identify */ - var templateCounter = 0; - - /** `Object#toString` result shortcuts */ - var argsClass = '[object Arguments]', - arrayClass = '[object Array]', - boolClass = '[object Boolean]', - dateClass = '[object Date]', - errorClass = '[object Error]', - funcClass = '[object Function]', - numberClass = '[object Number]', - objectClass = '[object Object]', - regexpClass = '[object RegExp]', - stringClass = '[object String]'; - - /** Used to identify object classifications that `_.clone` supports */ - var cloneableClasses = {}; - cloneableClasses[funcClass] = false; - cloneableClasses[argsClass] = cloneableClasses[arrayClass] = - cloneableClasses[boolClass] = cloneableClasses[dateClass] = - cloneableClasses[numberClass] = cloneableClasses[objectClass] = - cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true; - - /** Used as an internal `_.debounce` options object */ - var debounceOptions = { - 'leading': false, - 'maxWait': 0, - 'trailing': false - }; - - /** Used as the property descriptor for `__bindData__` */ - var descriptor = { - 'configurable': false, - 'enumerable': false, - 'value': null, - 'writable': false - }; - - /** Used as the data object for `iteratorTemplate` */ - var iteratorData = { - 'args': '', - 'array': null, - 'bottom': '', - 'firstArg': '', - 'init': '', - 'keys': null, - 'loop': '', - 'shadowedProps': null, - 'support': null, - 'top': '', - 'useHas': false - }; - - /** Used to determine if values are of the language type Object */ - var objectTypes = { - 'boolean': false, - 'function': true, - 'object': true, - 'number': false, - 'string': false, - 'undefined': false - }; - - /** Used to escape characters for inclusion in compiled string literals */ - var stringEscapes = { - '\\': '\\', - "'": "'", - '\n': 'n', - '\r': 'r', - '\t': 't', - '\u2028': 'u2028', - '\u2029': 'u2029' - }; - - /** Used as a reference to the global object */ - var root = (objectTypes[typeof window] && window) || this; - - /** Detect free variable `exports` */ - var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports; - - /** Detect free variable `module` */ - var freeModule = objectTypes[typeof module] && module && !module.nodeType && module; - - /** Detect the popular CommonJS extension `module.exports` */ - var moduleExports = freeModule && freeModule.exports === freeExports && freeExports; - - /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */ - var freeGlobal = objectTypes[typeof global] && global; - if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) { - root = freeGlobal; - } - - /*--------------------------------------------------------------------------*/ - - /** - * The base implementation of `_.indexOf` without support for binary searches - * or `fromIndex` constraints. - * - * @private - * @param {Array} array The array to search. - * @param {*} value The value to search for. - * @param {number} [fromIndex=0] The index to search from. - * @returns {number} Returns the index of the matched value or `-1`. - */ - function baseIndexOf(array, value, fromIndex) { - var index = (fromIndex || 0) - 1, - length = array ? array.length : 0; - - while (++index < length) { - if (array[index] === value) { - return index; - } - } - return -1; - } - - /** - * An implementation of `_.contains` for cache objects that mimics the return - * signature of `_.indexOf` by returning `0` if the value is found, else `-1`. - * - * @private - * @param {Object} cache The cache object to inspect. - * @param {*} value The value to search for. - * @returns {number} Returns `0` if `value` is found, else `-1`. - */ - function cacheIndexOf(cache, value) { - var type = typeof value; - cache = cache.cache; - - if (type == 'boolean' || value == null) { - return cache[value] ? 0 : -1; - } - if (type != 'number' && type != 'string') { - type = 'object'; - } - var key = type == 'number' ? value : keyPrefix + value; - cache = (cache = cache[type]) && cache[key]; - - return type == 'object' - ? (cache && baseIndexOf(cache, value) > -1 ? 0 : -1) - : (cache ? 0 : -1); - } - - /** - * Adds a given value to the corresponding cache object. - * - * @private - * @param {*} value The value to add to the cache. - */ - function cachePush(value) { - var cache = this.cache, - type = typeof value; - - if (type == 'boolean' || value == null) { - cache[value] = true; - } else { - if (type != 'number' && type != 'string') { - type = 'object'; - } - var key = type == 'number' ? value : keyPrefix + value, - typeCache = cache[type] || (cache[type] = {}); - - if (type == 'object') { - (typeCache[key] || (typeCache[key] = [])).push(value); - } else { - typeCache[key] = true; - } - } - } - - /** - * Used by `_.max` and `_.min` as the default callback when a given - * collection is a string value. - * - * @private - * @param {string} value The character to inspect. - * @returns {number} Returns the code unit of given character. - */ - function charAtCallback(value) { - return value.charCodeAt(0); - } - - /** - * Used by `sortBy` to compare transformed `collection` elements, stable sorting - * them in ascending order. - * - * @private - * @param {Object} a The object to compare to `b`. - * @param {Object} b The object to compare to `a`. - * @returns {number} Returns the sort order indicator of `1` or `-1`. - */ - function compareAscending(a, b) { - var ac = a.criteria, - bc = b.criteria, - index = -1, - length = ac.length; - - while (++index < length) { - var value = ac[index], - other = bc[index]; - - if (value !== other) { - if (value > other || typeof value == 'undefined') { - return 1; - } - if (value < other || typeof other == 'undefined') { - return -1; - } - } - } - // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications - // that causes it, under certain circumstances, to return the same value for - // `a` and `b`. See https://github.com/jashkenas/underscore/pull/1247 - // - // This also ensures a stable sort in V8 and other engines. - // See http://code.google.com/p/v8/issues/detail?id=90 - return a.index - b.index; - } - - /** - * Creates a cache object to optimize linear searches of large arrays. - * - * @private - * @param {Array} [array=[]] The array to search. - * @returns {null|Object} Returns the cache object or `null` if caching should not be used. - */ - function createCache(array) { - var index = -1, - length = array.length, - first = array[0], - mid = array[(length / 2) | 0], - last = array[length - 1]; - - if (first && typeof first == 'object' && - mid && typeof mid == 'object' && last && typeof last == 'object') { - return false; - } - var cache = getObject(); - cache['false'] = cache['null'] = cache['true'] = cache['undefined'] = false; - - var result = getObject(); - result.array = array; - result.cache = cache; - result.push = cachePush; - - while (++index < length) { - result.push(array[index]); - } - return result; - } - - /** - * Used by `template` to escape characters for inclusion in compiled - * string literals. - * - * @private - * @param {string} match The matched character to escape. - * @returns {string} Returns the escaped character. - */ - function escapeStringChar(match) { - return '\\' + stringEscapes[match]; - } - - /** - * Gets an array from the array pool or creates a new one if the pool is empty. - * - * @private - * @returns {Array} The array from the pool. - */ - function getArray() { - return arrayPool.pop() || []; - } - - /** - * Gets an object from the object pool or creates a new one if the pool is empty. - * - * @private - * @returns {Object} The object from the pool. - */ - function getObject() { - return objectPool.pop() || { - 'array': null, - 'cache': null, - 'criteria': null, - 'false': false, - 'index': 0, - 'null': false, - 'number': null, - 'object': null, - 'push': null, - 'string': null, - 'true': false, - 'undefined': false, - 'value': null - }; - } - - /** - * Checks if `value` is a DOM node in IE < 9. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a DOM node, else `false`. - */ - function isNode(value) { - // IE < 9 presents DOM nodes as `Object` objects except they have `toString` - // methods that are `typeof` "string" and still can coerce nodes to strings - return typeof value.toString != 'function' && typeof (value + '') == 'string'; - } - - /** - * Releases the given array back to the array pool. - * - * @private - * @param {Array} [array] The array to release. - */ - function releaseArray(array) { - array.length = 0; - if (arrayPool.length < maxPoolSize) { - arrayPool.push(array); - } - } - - /** - * Releases the given object back to the object pool. - * - * @private - * @param {Object} [object] The object to release. - */ - function releaseObject(object) { - var cache = object.cache; - if (cache) { - releaseObject(cache); - } - object.array = object.cache = object.criteria = object.object = object.number = object.string = object.value = null; - if (objectPool.length < maxPoolSize) { - objectPool.push(object); - } - } - - /** - * Slices the `collection` from the `start` index up to, but not including, - * the `end` index. - * - * Note: This function is used instead of `Array#slice` to support node lists - * in IE < 9 and to ensure dense arrays are returned. - * - * @private - * @param {Array|Object|string} collection The collection to slice. - * @param {number} start The start index. - * @param {number} end The end index. - * @returns {Array} Returns the new array. - */ - function slice(array, start, end) { - start || (start = 0); - if (typeof end == 'undefined') { - end = array ? array.length : 0; - } - var index = -1, - length = end - start || 0, - result = Array(length < 0 ? 0 : length); - - while (++index < length) { - result[index] = array[start + index]; - } - return result; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Create a new `lodash` function using the given context object. - * - * @static - * @memberOf _ - * @category Utilities - * @param {Object} [context=root] The context object. - * @returns {Function} Returns the `lodash` function. - */ - function runInContext(context) { - // Avoid issues with some ES3 environments that attempt to use values, named - // after built-in constructors like `Object`, for the creation of literals. - // ES5 clears this up by stating that literals must use built-in constructors. - // See http://es5.github.io/#x11.1.5. - context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root; - - /** Native constructor references */ - var Array = context.Array, - Boolean = context.Boolean, - Date = context.Date, - Error = context.Error, - Function = context.Function, - Math = context.Math, - Number = context.Number, - Object = context.Object, - RegExp = context.RegExp, - String = context.String, - TypeError = context.TypeError; - - /** - * Used for `Array` method references. - * - * Normally `Array.prototype` would suffice, however, using an array literal - * avoids issues in Narwhal. - */ - var arrayRef = []; - - /** Used for native method references */ - var errorProto = Error.prototype, - objectProto = Object.prototype, - stringProto = String.prototype; - - /** Used to restore the original `_` reference in `noConflict` */ - var oldDash = context._; - - /** Used to resolve the internal [[Class]] of values */ - var toString = objectProto.toString; - - /** Used to detect if a method is native */ - var reNative = RegExp('^' + - String(toString) - .replace(/[.*+?^${}()|[\]\\]/g, '\\$&') - .replace(/toString| for [^\]]+/g, '.*?') + '$' - ); - - /** Native method shortcuts */ - var ceil = Math.ceil, - clearTimeout = context.clearTimeout, - floor = Math.floor, - fnToString = Function.prototype.toString, - getPrototypeOf = isNative(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf, - hasOwnProperty = objectProto.hasOwnProperty, - push = arrayRef.push, - propertyIsEnumerable = objectProto.propertyIsEnumerable, - setTimeout = context.setTimeout, - splice = arrayRef.splice, - unshift = arrayRef.unshift; - - /** Used to set meta data on functions */ - var defineProperty = (function() { - // IE 8 only accepts DOM elements - try { - var o = {}, - func = isNative(func = Object.defineProperty) && func, - result = func(o, o, o) && func; - } catch(e) { } - return result; - }()); - - /* Native method shortcuts for methods with the same name as other `lodash` methods */ - var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate, - nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray, - nativeIsFinite = context.isFinite, - nativeIsNaN = context.isNaN, - nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys, - nativeMax = Math.max, - nativeMin = Math.min, - nativeParseInt = context.parseInt, - nativeRandom = Math.random; - - /** Used to lookup a built-in constructor by [[Class]] */ - var ctorByClass = {}; - ctorByClass[arrayClass] = Array; - ctorByClass[boolClass] = Boolean; - ctorByClass[dateClass] = Date; - ctorByClass[funcClass] = Function; - ctorByClass[objectClass] = Object; - ctorByClass[numberClass] = Number; - ctorByClass[regexpClass] = RegExp; - ctorByClass[stringClass] = String; - - /** Used to avoid iterating non-enumerable properties in IE < 9 */ - var nonEnumProps = {}; - nonEnumProps[arrayClass] = nonEnumProps[dateClass] = nonEnumProps[numberClass] = { 'constructor': true, 'toLocaleString': true, 'toString': true, 'valueOf': true }; - nonEnumProps[boolClass] = nonEnumProps[stringClass] = { 'constructor': true, 'toString': true, 'valueOf': true }; - nonEnumProps[errorClass] = nonEnumProps[funcClass] = nonEnumProps[regexpClass] = { 'constructor': true, 'toString': true }; - nonEnumProps[objectClass] = { 'constructor': true }; - - (function() { - var length = shadowedProps.length; - while (length--) { - var key = shadowedProps[length]; - for (var className in nonEnumProps) { - if (hasOwnProperty.call(nonEnumProps, className) && !hasOwnProperty.call(nonEnumProps[className], key)) { - nonEnumProps[className][key] = false; - } - } - } - }()); - - /*--------------------------------------------------------------------------*/ - - /** - * Creates a `lodash` object which wraps the given value to enable intuitive - * method chaining. - * - * In addition to Lo-Dash methods, wrappers also have the following `Array` methods: - * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`, - * and `unshift` - * - * Chaining is supported in custom builds as long as the `value` method is - * implicitly or explicitly included in the build. - * - * The chainable wrapper functions are: - * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`, - * `compose`, `concat`, `countBy`, `create`, `createCallback`, `curry`, - * `debounce`, `defaults`, `defer`, `delay`, `difference`, `filter`, `flatten`, - * `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`, - * `functions`, `groupBy`, `indexBy`, `initial`, `intersection`, `invert`, - * `invoke`, `keys`, `map`, `max`, `memoize`, `merge`, `min`, `object`, `omit`, - * `once`, `pairs`, `partial`, `partialRight`, `pick`, `pluck`, `pull`, `push`, - * `range`, `reject`, `remove`, `rest`, `reverse`, `shuffle`, `slice`, `sort`, - * `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`, `transform`, - * `union`, `uniq`, `unshift`, `unzip`, `values`, `where`, `without`, `wrap`, - * and `zip` - * - * The non-chainable wrapper functions are: - * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `findIndex`, - * `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `has`, `identity`, - * `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`, - * `isEmpty`, `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`, - * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`, - * `lastIndexOf`, `mixin`, `noConflict`, `parseInt`, `pop`, `random`, `reduce`, - * `reduceRight`, `result`, `shift`, `size`, `some`, `sortedIndex`, `runInContext`, - * `template`, `unescape`, `uniqueId`, and `value` - * - * The wrapper functions `first` and `last` return wrapped values when `n` is - * provided, otherwise they return unwrapped values. - * - * Explicit chaining can be enabled by using the `_.chain` method. - * - * @name _ - * @constructor - * @category Chaining - * @param {*} value The value to wrap in a `lodash` instance. - * @returns {Object} Returns a `lodash` instance. - * @example - * - * var wrapped = _([1, 2, 3]); - * - * // returns an unwrapped value - * wrapped.reduce(function(sum, num) { - * return sum + num; - * }); - * // => 6 - * - * // returns a wrapped value - * var squares = wrapped.map(function(num) { - * return num * num; - * }); - * - * _.isArray(squares); - * // => false - * - * _.isArray(squares.value()); - * // => true - */ - function lodash(value) { - // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor - return (value && typeof value == 'object' && !isArray(value) && hasOwnProperty.call(value, '__wrapped__')) - ? value - : new lodashWrapper(value); - } - - /** - * A fast path for creating `lodash` wrapper objects. - * - * @private - * @param {*} value The value to wrap in a `lodash` instance. - * @param {boolean} chainAll A flag to enable chaining for all methods - * @returns {Object} Returns a `lodash` instance. - */ - function lodashWrapper(value, chainAll) { - this.__chain__ = !!chainAll; - this.__wrapped__ = value; - } - // ensure `new lodashWrapper` is an instance of `lodash` - lodashWrapper.prototype = lodash.prototype; - - /** - * An object used to flag environments features. - * - * @static - * @memberOf _ - * @type Object - */ - var support = lodash.support = {}; - - (function() { - var ctor = function() { this.x = 1; }, - object = { '0': 1, 'length': 1 }, - props = []; - - ctor.prototype = { 'valueOf': 1, 'y': 1 }; - for (var key in new ctor) { props.push(key); } - for (key in arguments) { } - - /** - * Detect if an `arguments` object's [[Class]] is resolvable (all but Firefox < 4, IE < 9). - * - * @memberOf _.support - * @type boolean - */ - support.argsClass = toString.call(arguments) == argsClass; - - /** - * Detect if `arguments` objects are `Object` objects (all but Narwhal and Opera < 10.5). - * - * @memberOf _.support - * @type boolean - */ - support.argsObject = arguments.constructor == Object && !(arguments instanceof Array); - - /** - * Detect if `name` or `message` properties of `Error.prototype` are - * enumerable by default. (IE < 9, Safari < 5.1) - * - * @memberOf _.support - * @type boolean - */ - support.enumErrorProps = propertyIsEnumerable.call(errorProto, 'message') || propertyIsEnumerable.call(errorProto, 'name'); - - /** - * Detect if `prototype` properties are enumerable by default. - * - * Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1 - * (if the prototype or a property on the prototype has been set) - * incorrectly sets a function's `prototype` property [[Enumerable]] - * value to `true`. - * - * @memberOf _.support - * @type boolean - */ - support.enumPrototypes = propertyIsEnumerable.call(ctor, 'prototype'); - - /** - * Detect if functions can be decompiled by `Function#toString` - * (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps). - * - * @memberOf _.support - * @type boolean - */ - support.funcDecomp = !isNative(context.WinRTError) && reThis.test(runInContext); - - /** - * Detect if `Function#name` is supported (all but IE). - * - * @memberOf _.support - * @type boolean - */ - support.funcNames = typeof Function.name == 'string'; - - /** - * Detect if `arguments` object indexes are non-enumerable - * (Firefox < 4, IE < 9, PhantomJS, Safari < 5.1). - * - * @memberOf _.support - * @type boolean - */ - support.nonEnumArgs = key != 0; - - /** - * Detect if properties shadowing those on `Object.prototype` are non-enumerable. - * - * In IE < 9 an objects own properties, shadowing non-enumerable ones, are - * made non-enumerable as well (a.k.a the JScript [[DontEnum]] bug). - * - * @memberOf _.support - * @type boolean - */ - support.nonEnumShadows = !/valueOf/.test(props); - - /** - * Detect if own properties are iterated after inherited properties (all but IE < 9). - * - * @memberOf _.support - * @type boolean - */ - support.ownLast = props[0] != 'x'; - - /** - * Detect if `Array#shift` and `Array#splice` augment array-like objects correctly. - * - * Firefox < 10, IE compatibility mode, and IE < 9 have buggy Array `shift()` - * and `splice()` functions that fail to remove the last element, `value[0]`, - * of array-like objects even though the `length` property is set to `0`. - * The `shift()` method is buggy in IE 8 compatibility mode, while `splice()` - * is buggy regardless of mode in IE < 9 and buggy in compatibility mode in IE 9. - * - * @memberOf _.support - * @type boolean - */ - support.spliceObjects = (arrayRef.splice.call(object, 0, 1), !object[0]); - - /** - * Detect lack of support for accessing string characters by index. - * - * IE < 8 can't access characters by index and IE 8 can only access - * characters by index on string literals. - * - * @memberOf _.support - * @type boolean - */ - support.unindexedChars = ('x'[0] + Object('x')[0]) != 'xx'; - - /** - * Detect if a DOM node's [[Class]] is resolvable (all but IE < 9) - * and that the JS engine errors when attempting to coerce an object to - * a string without a `toString` function. - * - * @memberOf _.support - * @type boolean - */ - try { - support.nodeClass = !(toString.call(document) == objectClass && !({ 'toString': 0 } + '')); - } catch(e) { - support.nodeClass = true; - } - }(1)); - - /** - * By default, the template delimiters used by Lo-Dash are similar to those in - * embedded Ruby (ERB). Change the following template settings to use alternative - * delimiters. - * - * @static - * @memberOf _ - * @type Object - */ - lodash.templateSettings = { - - /** - * Used to detect `data` property values to be HTML-escaped. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'escape': /<%-([\s\S]+?)%>/g, - - /** - * Used to detect code to be evaluated. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'evaluate': /<%([\s\S]+?)%>/g, - - /** - * Used to detect `data` property values to inject. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'interpolate': reInterpolate, - - /** - * Used to reference the data object in the template text. - * - * @memberOf _.templateSettings - * @type string - */ - 'variable': '', - - /** - * Used to import variables into the compiled template. - * - * @memberOf _.templateSettings - * @type Object - */ - 'imports': { - - /** - * A reference to the `lodash` function. - * - * @memberOf _.templateSettings.imports - * @type Function - */ - '_': lodash - } - }; - - /*--------------------------------------------------------------------------*/ - - /** - * The template used to create iterator functions. - * - * @private - * @param {Object} data The data object used to populate the text. - * @returns {string} Returns the interpolated text. - */ - var iteratorTemplate = function(obj) { - - var __p = 'var index, iterable = ' + - (obj.firstArg) + - ', result = ' + - (obj.init) + - ';\nif (!iterable) return result;\n' + - (obj.top) + - ';'; - if (obj.array) { - __p += '\nvar length = iterable.length; index = -1;\nif (' + - (obj.array) + - ') { '; - if (support.unindexedChars) { - __p += '\n if (isString(iterable)) {\n iterable = iterable.split(\'\')\n } '; - } - __p += '\n while (++index < length) {\n ' + - (obj.loop) + - ';\n }\n}\nelse { '; - } else if (support.nonEnumArgs) { - __p += '\n var length = iterable.length; index = -1;\n if (length && isArguments(iterable)) {\n while (++index < length) {\n index += \'\';\n ' + - (obj.loop) + - ';\n }\n } else { '; - } - - if (support.enumPrototypes) { - __p += '\n var skipProto = typeof iterable == \'function\';\n '; - } - - if (support.enumErrorProps) { - __p += '\n var skipErrorProps = iterable === errorProto || iterable instanceof Error;\n '; - } - - var conditions = []; if (support.enumPrototypes) { conditions.push('!(skipProto && index == "prototype")'); } if (support.enumErrorProps) { conditions.push('!(skipErrorProps && (index == "message" || index == "name"))'); } - - if (obj.useHas && obj.keys) { - __p += '\n var ownIndex = -1,\n ownProps = objectTypes[typeof iterable] && keys(iterable),\n length = ownProps ? ownProps.length : 0;\n\n while (++ownIndex < length) {\n index = ownProps[ownIndex];\n'; - if (conditions.length) { - __p += ' if (' + - (conditions.join(' && ')) + - ') {\n '; - } - __p += - (obj.loop) + - '; '; - if (conditions.length) { - __p += '\n }'; - } - __p += '\n } '; - } else { - __p += '\n for (index in iterable) {\n'; - if (obj.useHas) { conditions.push("hasOwnProperty.call(iterable, index)"); } if (conditions.length) { - __p += ' if (' + - (conditions.join(' && ')) + - ') {\n '; - } - __p += - (obj.loop) + - '; '; - if (conditions.length) { - __p += '\n }'; - } - __p += '\n } '; - if (support.nonEnumShadows) { - __p += '\n\n if (iterable !== objectProto) {\n var ctor = iterable.constructor,\n isProto = iterable === (ctor && ctor.prototype),\n className = iterable === stringProto ? stringClass : iterable === errorProto ? errorClass : toString.call(iterable),\n nonEnum = nonEnumProps[className];\n '; - for (k = 0; k < 7; k++) { - __p += '\n index = \'' + - (obj.shadowedProps[k]) + - '\';\n if ((!(isProto && nonEnum[index]) && hasOwnProperty.call(iterable, index))'; - if (!obj.useHas) { - __p += ' || (!nonEnum[index] && iterable[index] !== objectProto[index])'; - } - __p += ') {\n ' + - (obj.loop) + - ';\n } '; - } - __p += '\n } '; - } - - } - - if (obj.array || support.nonEnumArgs) { - __p += '\n}'; - } - __p += - (obj.bottom) + - ';\nreturn result'; - - return __p - }; - - /*--------------------------------------------------------------------------*/ - - /** - * The base implementation of `_.bind` that creates the bound function and - * sets its meta data. - * - * @private - * @param {Array} bindData The bind data array. - * @returns {Function} Returns the new bound function. - */ - function baseBind(bindData) { - var func = bindData[0], - partialArgs = bindData[2], - thisArg = bindData[4]; - - function bound() { - // `Function#bind` spec - // http://es5.github.io/#x15.3.4.5 - if (partialArgs) { - // avoid `arguments` object deoptimizations by using `slice` instead - // of `Array.prototype.slice.call` and not assigning `arguments` to a - // variable as a ternary expression - var args = slice(partialArgs); - push.apply(args, arguments); - } - // mimic the constructor's `return` behavior - // http://es5.github.io/#x13.2.2 - if (this instanceof bound) { - // ensure `new bound` is an instance of `func` - var thisBinding = baseCreate(func.prototype), - result = func.apply(thisBinding, args || arguments); - return isObject(result) ? result : thisBinding; - } - return func.apply(thisArg, args || arguments); - } - setBindData(bound, bindData); - return bound; - } - - /** - * The base implementation of `_.clone` without argument juggling or support - * for `thisArg` binding. - * - * @private - * @param {*} value The value to clone. - * @param {boolean} [isDeep=false] Specify a deep clone. - * @param {Function} [callback] The function to customize cloning values. - * @param {Array} [stackA=[]] Tracks traversed source objects. - * @param {Array} [stackB=[]] Associates clones with source counterparts. - * @returns {*} Returns the cloned value. - */ - function baseClone(value, isDeep, callback, stackA, stackB) { - if (callback) { - var result = callback(value); - if (typeof result != 'undefined') { - return result; - } - } - // inspect [[Class]] - var isObj = isObject(value); - if (isObj) { - var className = toString.call(value); - if (!cloneableClasses[className] || (!support.nodeClass && isNode(value))) { - return value; - } - var ctor = ctorByClass[className]; - switch (className) { - case boolClass: - case dateClass: - return new ctor(+value); - - case numberClass: - case stringClass: - return new ctor(value); - - case regexpClass: - result = ctor(value.source, reFlags.exec(value)); - result.lastIndex = value.lastIndex; - return result; - } - } else { - return value; - } - var isArr = isArray(value); - if (isDeep) { - // check for circular references and return corresponding clone - var initedStack = !stackA; - stackA || (stackA = getArray()); - stackB || (stackB = getArray()); - - var length = stackA.length; - while (length--) { - if (stackA[length] == value) { - return stackB[length]; - } - } - result = isArr ? ctor(value.length) : {}; - } - else { - result = isArr ? slice(value) : assign({}, value); - } - // add array properties assigned by `RegExp#exec` - if (isArr) { - if (hasOwnProperty.call(value, 'index')) { - result.index = value.index; - } - if (hasOwnProperty.call(value, 'input')) { - result.input = value.input; - } - } - // exit for shallow clone - if (!isDeep) { - return result; - } - // add the source value to the stack of traversed objects - // and associate it with its clone - stackA.push(value); - stackB.push(result); - - // recursively populate clone (susceptible to call stack limits) - (isArr ? baseEach : forOwn)(value, function(objValue, key) { - result[key] = baseClone(objValue, isDeep, callback, stackA, stackB); - }); - - if (initedStack) { - releaseArray(stackA); - releaseArray(stackB); - } - return result; - } - - /** - * The base implementation of `_.create` without support for assigning - * properties to the created object. - * - * @private - * @param {Object} prototype The object to inherit from. - * @returns {Object} Returns the new object. - */ - function baseCreate(prototype, properties) { - return isObject(prototype) ? nativeCreate(prototype) : {}; - } - // fallback for browsers without `Object.create` - if (!nativeCreate) { - baseCreate = (function() { - function Object() {} - return function(prototype) { - if (isObject(prototype)) { - Object.prototype = prototype; - var result = new Object; - Object.prototype = null; - } - return result || context.Object(); - }; - }()); - } - - /** - * The base implementation of `_.createCallback` without support for creating - * "_.pluck" or "_.where" style callbacks. - * - * @private - * @param {*} [func=identity] The value to convert to a callback. - * @param {*} [thisArg] The `this` binding of the created callback. - * @param {number} [argCount] The number of arguments the callback accepts. - * @returns {Function} Returns a callback function. - */ - function baseCreateCallback(func, thisArg, argCount) { - if (typeof func != 'function') { - return identity; - } - // exit early for no `thisArg` or already bound by `Function#bind` - if (typeof thisArg == 'undefined' || !('prototype' in func)) { - return func; - } - var bindData = func.__bindData__; - if (typeof bindData == 'undefined') { - if (support.funcNames) { - bindData = !func.name; - } - bindData = bindData || !support.funcDecomp; - if (!bindData) { - var source = fnToString.call(func); - if (!support.funcNames) { - bindData = !reFuncName.test(source); - } - if (!bindData) { - // checks if `func` references the `this` keyword and stores the result - bindData = reThis.test(source); - setBindData(func, bindData); - } - } - } - // exit early if there are no `this` references or `func` is bound - if (bindData === false || (bindData !== true && bindData[1] & 1)) { - return func; - } - switch (argCount) { - case 1: return function(value) { - return func.call(thisArg, value); - }; - case 2: return function(a, b) { - return func.call(thisArg, a, b); - }; - case 3: return function(value, index, collection) { - return func.call(thisArg, value, index, collection); - }; - case 4: return function(accumulator, value, index, collection) { - return func.call(thisArg, accumulator, value, index, collection); - }; - } - return bind(func, thisArg); - } - - /** - * The base implementation of `createWrapper` that creates the wrapper and - * sets its meta data. - * - * @private - * @param {Array} bindData The bind data array. - * @returns {Function} Returns the new function. - */ - function baseCreateWrapper(bindData) { - var func = bindData[0], - bitmask = bindData[1], - partialArgs = bindData[2], - partialRightArgs = bindData[3], - thisArg = bindData[4], - arity = bindData[5]; - - var isBind = bitmask & 1, - isBindKey = bitmask & 2, - isCurry = bitmask & 4, - isCurryBound = bitmask & 8, - key = func; - - function bound() { - var thisBinding = isBind ? thisArg : this; - if (partialArgs) { - var args = slice(partialArgs); - push.apply(args, arguments); - } - if (partialRightArgs || isCurry) { - args || (args = slice(arguments)); - if (partialRightArgs) { - push.apply(args, partialRightArgs); - } - if (isCurry && args.length < arity) { - bitmask |= 16 & ~32; - return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]); - } - } - args || (args = arguments); - if (isBindKey) { - func = thisBinding[key]; - } - if (this instanceof bound) { - thisBinding = baseCreate(func.prototype); - var result = func.apply(thisBinding, args); - return isObject(result) ? result : thisBinding; - } - return func.apply(thisBinding, args); - } - setBindData(bound, bindData); - return bound; - } - - /** - * The base implementation of `_.difference` that accepts a single array - * of values to exclude. - * - * @private - * @param {Array} array The array to process. - * @param {Array} [values] The array of values to exclude. - * @returns {Array} Returns a new array of filtered values. - */ - function baseDifference(array, values) { - var index = -1, - indexOf = getIndexOf(), - length = array ? array.length : 0, - isLarge = length >= largeArraySize && indexOf === baseIndexOf, - result = []; - - if (isLarge) { - var cache = createCache(values); - if (cache) { - indexOf = cacheIndexOf; - values = cache; - } else { - isLarge = false; - } - } - while (++index < length) { - var value = array[index]; - if (indexOf(values, value) < 0) { - result.push(value); - } - } - if (isLarge) { - releaseObject(values); - } - return result; - } - - /** - * The base implementation of `_.flatten` without support for callback - * shorthands or `thisArg` binding. - * - * @private - * @param {Array} array The array to flatten. - * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level. - * @param {boolean} [isStrict=false] A flag to restrict flattening to arrays and `arguments` objects. - * @param {number} [fromIndex=0] The index to start from. - * @returns {Array} Returns a new flattened array. - */ - function baseFlatten(array, isShallow, isStrict, fromIndex) { - var index = (fromIndex || 0) - 1, - length = array ? array.length : 0, - result = []; - - while (++index < length) { - var value = array[index]; - - if (value && typeof value == 'object' && typeof value.length == 'number' - && (isArray(value) || isArguments(value))) { - // recursively flatten arrays (susceptible to call stack limits) - if (!isShallow) { - value = baseFlatten(value, isShallow, isStrict); - } - var valIndex = -1, - valLength = value.length, - resIndex = result.length; - - result.length += valLength; - while (++valIndex < valLength) { - result[resIndex++] = value[valIndex]; - } - } else if (!isStrict) { - result.push(value); - } - } - return result; - } - - /** - * The base implementation of `_.isEqual`, without support for `thisArg` binding, - * that allows partial "_.where" style comparisons. - * - * @private - * @param {*} a The value to compare. - * @param {*} b The other value to compare. - * @param {Function} [callback] The function to customize comparing values. - * @param {Function} [isWhere=false] A flag to indicate performing partial comparisons. - * @param {Array} [stackA=[]] Tracks traversed `a` objects. - * @param {Array} [stackB=[]] Tracks traversed `b` objects. - * @returns {boolean} Returns `true` if the values are equivalent, else `false`. - */ - function baseIsEqual(a, b, callback, isWhere, stackA, stackB) { - // used to indicate that when comparing objects, `a` has at least the properties of `b` - if (callback) { - var result = callback(a, b); - if (typeof result != 'undefined') { - return !!result; - } - } - // exit early for identical values - if (a === b) { - // treat `+0` vs. `-0` as not equal - return a !== 0 || (1 / a == 1 / b); - } - var type = typeof a, - otherType = typeof b; - - // exit early for unlike primitive values - if (a === a && - !(a && objectTypes[type]) && - !(b && objectTypes[otherType])) { - return false; - } - // exit early for `null` and `undefined` avoiding ES3's Function#call behavior - // http://es5.github.io/#x15.3.4.4 - if (a == null || b == null) { - return a === b; - } - // compare [[Class]] names - var className = toString.call(a), - otherClass = toString.call(b); - - if (className == argsClass) { - className = objectClass; - } - if (otherClass == argsClass) { - otherClass = objectClass; - } - if (className != otherClass) { - return false; - } - switch (className) { - case boolClass: - case dateClass: - // coerce dates and booleans to numbers, dates to milliseconds and booleans - // to `1` or `0` treating invalid dates coerced to `NaN` as not equal - return +a == +b; - - case numberClass: - // treat `NaN` vs. `NaN` as equal - return (a != +a) - ? b != +b - // but treat `+0` vs. `-0` as not equal - : (a == 0 ? (1 / a == 1 / b) : a == +b); - - case regexpClass: - case stringClass: - // coerce regexes to strings (http://es5.github.io/#x15.10.6.4) - // treat string primitives and their corresponding object instances as equal - return a == String(b); - } - var isArr = className == arrayClass; - if (!isArr) { - // unwrap any `lodash` wrapped values - var aWrapped = hasOwnProperty.call(a, '__wrapped__'), - bWrapped = hasOwnProperty.call(b, '__wrapped__'); - - if (aWrapped || bWrapped) { - return baseIsEqual(aWrapped ? a.__wrapped__ : a, bWrapped ? b.__wrapped__ : b, callback, isWhere, stackA, stackB); - } - // exit for functions and DOM nodes - if (className != objectClass || (!support.nodeClass && (isNode(a) || isNode(b)))) { - return false; - } - // in older versions of Opera, `arguments` objects have `Array` constructors - var ctorA = !support.argsObject && isArguments(a) ? Object : a.constructor, - ctorB = !support.argsObject && isArguments(b) ? Object : b.constructor; - - // non `Object` object instances with different constructors are not equal - if (ctorA != ctorB && - !(isFunction(ctorA) && ctorA instanceof ctorA && isFunction(ctorB) && ctorB instanceof ctorB) && - ('constructor' in a && 'constructor' in b) - ) { - return false; - } - } - // assume cyclic structures are equal - // the algorithm for detecting cyclic structures is adapted from ES 5.1 - // section 15.12.3, abstract operation `JO` (http://es5.github.io/#x15.12.3) - var initedStack = !stackA; - stackA || (stackA = getArray()); - stackB || (stackB = getArray()); - - var length = stackA.length; - while (length--) { - if (stackA[length] == a) { - return stackB[length] == b; - } - } - var size = 0; - result = true; - - // add `a` and `b` to the stack of traversed objects - stackA.push(a); - stackB.push(b); - - // recursively compare objects and arrays (susceptible to call stack limits) - if (isArr) { - // compare lengths to determine if a deep comparison is necessary - length = a.length; - size = b.length; - result = size == length; - - if (result || isWhere) { - // deep compare the contents, ignoring non-numeric properties - while (size--) { - var index = length, - value = b[size]; - - if (isWhere) { - while (index--) { - if ((result = baseIsEqual(a[index], value, callback, isWhere, stackA, stackB))) { - break; - } - } - } else if (!(result = baseIsEqual(a[size], value, callback, isWhere, stackA, stackB))) { - break; - } - } - } - } - else { - // deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys` - // which, in this case, is more costly - forIn(b, function(value, key, b) { - if (hasOwnProperty.call(b, key)) { - // count the number of properties. - size++; - // deep compare each property value. - return (result = hasOwnProperty.call(a, key) && baseIsEqual(a[key], value, callback, isWhere, stackA, stackB)); - } - }); - - if (result && !isWhere) { - // ensure both objects have the same number of properties - forIn(a, function(value, key, a) { - if (hasOwnProperty.call(a, key)) { - // `size` will be `-1` if `a` has more properties than `b` - return (result = --size > -1); - } - }); - } - } - stackA.pop(); - stackB.pop(); - - if (initedStack) { - releaseArray(stackA); - releaseArray(stackB); - } - return result; - } - - /** - * The base implementation of `_.merge` without argument juggling or support - * for `thisArg` binding. - * - * @private - * @param {Object} object The destination object. - * @param {Object} source The source object. - * @param {Function} [callback] The function to customize merging properties. - * @param {Array} [stackA=[]] Tracks traversed source objects. - * @param {Array} [stackB=[]] Associates values with source counterparts. - */ - function baseMerge(object, source, callback, stackA, stackB) { - (isArray(source) ? forEach : forOwn)(source, function(source, key) { - var found, - isArr, - result = source, - value = object[key]; - - if (source && ((isArr = isArray(source)) || isPlainObject(source))) { - // avoid merging previously merged cyclic sources - var stackLength = stackA.length; - while (stackLength--) { - if ((found = stackA[stackLength] == source)) { - value = stackB[stackLength]; - break; - } - } - if (!found) { - var isShallow; - if (callback) { - result = callback(value, source); - if ((isShallow = typeof result != 'undefined')) { - value = result; - } - } - if (!isShallow) { - value = isArr - ? (isArray(value) ? value : []) - : (isPlainObject(value) ? value : {}); - } - // add `source` and associated `value` to the stack of traversed objects - stackA.push(source); - stackB.push(value); - - // recursively merge objects and arrays (susceptible to call stack limits) - if (!isShallow) { - baseMerge(value, source, callback, stackA, stackB); - } - } - } - else { - if (callback) { - result = callback(value, source); - if (typeof result == 'undefined') { - result = source; - } - } - if (typeof result != 'undefined') { - value = result; - } - } - object[key] = value; - }); - } - - /** - * The base implementation of `_.random` without argument juggling or support - * for returning floating-point numbers. - * - * @private - * @param {number} min The minimum possible value. - * @param {number} max The maximum possible value. - * @returns {number} Returns a random number. - */ - function baseRandom(min, max) { - return min + floor(nativeRandom() * (max - min + 1)); - } - - /** - * The base implementation of `_.uniq` without support for callback shorthands - * or `thisArg` binding. - * - * @private - * @param {Array} array The array to process. - * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted. - * @param {Function} [callback] The function called per iteration. - * @returns {Array} Returns a duplicate-value-free array. - */ - function baseUniq(array, isSorted, callback) { - var index = -1, - indexOf = getIndexOf(), - length = array ? array.length : 0, - result = []; - - var isLarge = !isSorted && length >= largeArraySize && indexOf === baseIndexOf, - seen = (callback || isLarge) ? getArray() : result; - - if (isLarge) { - var cache = createCache(seen); - indexOf = cacheIndexOf; - seen = cache; - } - while (++index < length) { - var value = array[index], - computed = callback ? callback(value, index, array) : value; - - if (isSorted - ? !index || seen[seen.length - 1] !== computed - : indexOf(seen, computed) < 0 - ) { - if (callback || isLarge) { - seen.push(computed); - } - result.push(value); - } - } - if (isLarge) { - releaseArray(seen.array); - releaseObject(seen); - } else if (callback) { - releaseArray(seen); - } - return result; - } - - /** - * Creates a function that aggregates a collection, creating an object composed - * of keys generated from the results of running each element of the collection - * through a callback. The given `setter` function sets the keys and values - * of the composed object. - * - * @private - * @param {Function} setter The setter function. - * @returns {Function} Returns the new aggregator function. - */ - function createAggregator(setter) { - return function(collection, callback, thisArg) { - var result = {}; - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - setter(result, value, callback(value, index, collection), collection); - } - } else { - baseEach(collection, function(value, key, collection) { - setter(result, value, callback(value, key, collection), collection); - }); - } - return result; - }; - } - - /** - * Creates a function that, when called, either curries or invokes `func` - * with an optional `this` binding and partially applied arguments. - * - * @private - * @param {Function|string} func The function or method name to reference. - * @param {number} bitmask The bitmask of method flags to compose. - * The bitmask may be composed of the following flags: - * 1 - `_.bind` - * 2 - `_.bindKey` - * 4 - `_.curry` - * 8 - `_.curry` (bound) - * 16 - `_.partial` - * 32 - `_.partialRight` - * @param {Array} [partialArgs] An array of arguments to prepend to those - * provided to the new function. - * @param {Array} [partialRightArgs] An array of arguments to append to those - * provided to the new function. - * @param {*} [thisArg] The `this` binding of `func`. - * @param {number} [arity] The arity of `func`. - * @returns {Function} Returns the new function. - */ - function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) { - var isBind = bitmask & 1, - isBindKey = bitmask & 2, - isCurry = bitmask & 4, - isCurryBound = bitmask & 8, - isPartial = bitmask & 16, - isPartialRight = bitmask & 32; - - if (!isBindKey && !isFunction(func)) { - throw new TypeError; - } - if (isPartial && !partialArgs.length) { - bitmask &= ~16; - isPartial = partialArgs = false; - } - if (isPartialRight && !partialRightArgs.length) { - bitmask &= ~32; - isPartialRight = partialRightArgs = false; - } - var bindData = func && func.__bindData__; - if (bindData && bindData !== true) { - // clone `bindData` - bindData = slice(bindData); - if (bindData[2]) { - bindData[2] = slice(bindData[2]); - } - if (bindData[3]) { - bindData[3] = slice(bindData[3]); - } - // set `thisBinding` is not previously bound - if (isBind && !(bindData[1] & 1)) { - bindData[4] = thisArg; - } - // set if previously bound but not currently (subsequent curried functions) - if (!isBind && bindData[1] & 1) { - bitmask |= 8; - } - // set curried arity if not yet set - if (isCurry && !(bindData[1] & 4)) { - bindData[5] = arity; - } - // append partial left arguments - if (isPartial) { - push.apply(bindData[2] || (bindData[2] = []), partialArgs); - } - // append partial right arguments - if (isPartialRight) { - unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs); - } - // merge flags - bindData[1] |= bitmask; - return createWrapper.apply(null, bindData); - } - // fast path for `_.bind` - var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper; - return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]); - } - - /** - * Creates compiled iteration functions. - * - * @private - * @param {...Object} [options] The compile options object(s). - * @param {string} [options.array] Code to determine if the iterable is an array or array-like. - * @param {boolean} [options.useHas] Specify using `hasOwnProperty` checks in the object loop. - * @param {Function} [options.keys] A reference to `_.keys` for use in own property iteration. - * @param {string} [options.args] A comma separated string of iteration function arguments. - * @param {string} [options.top] Code to execute before the iteration branches. - * @param {string} [options.loop] Code to execute in the object loop. - * @param {string} [options.bottom] Code to execute after the iteration branches. - * @returns {Function} Returns the compiled function. - */ - function createIterator() { - // data properties - iteratorData.shadowedProps = shadowedProps; - - // iterator options - iteratorData.array = iteratorData.bottom = iteratorData.loop = iteratorData.top = ''; - iteratorData.init = 'iterable'; - iteratorData.useHas = true; - - // merge options into a template data object - for (var object, index = 0; object = arguments[index]; index++) { - for (var key in object) { - iteratorData[key] = object[key]; - } - } - var args = iteratorData.args; - iteratorData.firstArg = /^[^,]+/.exec(args)[0]; - - // create the function factory - var factory = Function( - 'baseCreateCallback, errorClass, errorProto, hasOwnProperty, ' + - 'indicatorObject, isArguments, isArray, isString, keys, objectProto, ' + - 'objectTypes, nonEnumProps, stringClass, stringProto, toString', - 'return function(' + args + ') {\n' + iteratorTemplate(iteratorData) + '\n}' - ); - - // return the compiled function - return factory( - baseCreateCallback, errorClass, errorProto, hasOwnProperty, - indicatorObject, isArguments, isArray, isString, iteratorData.keys, objectProto, - objectTypes, nonEnumProps, stringClass, stringProto, toString - ); - } - - /** - * Used by `escape` to convert characters to HTML entities. - * - * @private - * @param {string} match The matched character to escape. - * @returns {string} Returns the escaped character. - */ - function escapeHtmlChar(match) { - return htmlEscapes[match]; - } - - /** - * Gets the appropriate "indexOf" function. If the `_.indexOf` method is - * customized, this method returns the custom method, otherwise it returns - * the `baseIndexOf` function. - * - * @private - * @returns {Function} Returns the "indexOf" function. - */ - function getIndexOf() { - var result = (result = lodash.indexOf) === indexOf ? baseIndexOf : result; - return result; - } - - /** - * Checks if `value` is a native function. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a native function, else `false`. - */ - function isNative(value) { - return typeof value == 'function' && reNative.test(value); - } - - /** - * Sets `this` binding data on a given function. - * - * @private - * @param {Function} func The function to set data on. - * @param {Array} value The data array to set. - */ - var setBindData = !defineProperty ? noop : function(func, value) { - descriptor.value = value; - defineProperty(func, '__bindData__', descriptor); - }; - - /** - * A fallback implementation of `isPlainObject` which checks if a given value - * is an object created by the `Object` constructor, assuming objects created - * by the `Object` constructor have no inherited enumerable properties and that - * there are no `Object.prototype` extensions. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a plain object, else `false`. - */ - function shimIsPlainObject(value) { - var ctor, - result; - - // avoid non Object objects, `arguments` objects, and DOM elements - if (!(value && toString.call(value) == objectClass) || - (ctor = value.constructor, isFunction(ctor) && !(ctor instanceof ctor)) || - (!support.argsClass && isArguments(value)) || - (!support.nodeClass && isNode(value))) { - return false; - } - // IE < 9 iterates inherited properties before own properties. If the first - // iterated property is an object's own property then there are no inherited - // enumerable properties. - if (support.ownLast) { - forIn(value, function(value, key, object) { - result = hasOwnProperty.call(object, key); - return false; - }); - return result !== false; - } - // In most environments an object's own properties are iterated before - // its inherited properties. If the last iterated property is an object's - // own property then there are no inherited enumerable properties. - forIn(value, function(value, key) { - result = key; - }); - return typeof result == 'undefined' || hasOwnProperty.call(value, result); - } - - /** - * Used by `unescape` to convert HTML entities to characters. - * - * @private - * @param {string} match The matched character to unescape. - * @returns {string} Returns the unescaped character. - */ - function unescapeHtmlChar(match) { - return htmlUnescapes[match]; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Checks if `value` is an `arguments` object. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is an `arguments` object, else `false`. - * @example - * - * (function() { return _.isArguments(arguments); })(1, 2, 3); - * // => true - * - * _.isArguments([1, 2, 3]); - * // => false - */ - function isArguments(value) { - return value && typeof value == 'object' && typeof value.length == 'number' && - toString.call(value) == argsClass || false; - } - // fallback for browsers that can't detect `arguments` objects by [[Class]] - if (!support.argsClass) { - isArguments = function(value) { - return value && typeof value == 'object' && typeof value.length == 'number' && - hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee') || false; - }; - } - - /** - * Checks if `value` is an array. - * - * @static - * @memberOf _ - * @type Function - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is an array, else `false`. - * @example - * - * (function() { return _.isArray(arguments); })(); - * // => false - * - * _.isArray([1, 2, 3]); - * // => true - */ - var isArray = nativeIsArray || function(value) { - return value && typeof value == 'object' && typeof value.length == 'number' && - toString.call(value) == arrayClass || false; - }; - - /** - * A fallback implementation of `Object.keys` which produces an array of the - * given object's own enumerable property names. - * - * @private - * @type Function - * @param {Object} object The object to inspect. - * @returns {Array} Returns an array of property names. - */ - var shimKeys = createIterator({ - 'args': 'object', - 'init': '[]', - 'top': 'if (!(objectTypes[typeof object])) return result', - 'loop': 'result.push(index)' - }); - - /** - * Creates an array composed of the own enumerable property names of an object. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns an array of property names. - * @example - * - * _.keys({ 'one': 1, 'two': 2, 'three': 3 }); - * // => ['one', 'two', 'three'] (property order is not guaranteed across environments) - */ - var keys = !nativeKeys ? shimKeys : function(object) { - if (!isObject(object)) { - return []; - } - if ((support.enumPrototypes && typeof object == 'function') || - (support.nonEnumArgs && object.length && isArguments(object))) { - return shimKeys(object); - } - return nativeKeys(object); - }; - - /** Reusable iterator options shared by `each`, `forIn`, and `forOwn` */ - var eachIteratorOptions = { - 'args': 'collection, callback, thisArg', - 'top': "callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3)", - 'array': "typeof length == 'number'", - 'keys': keys, - 'loop': 'if (callback(iterable[index], index, collection) === false) return result' - }; - - /** Reusable iterator options for `assign` and `defaults` */ - var defaultsIteratorOptions = { - 'args': 'object, source, guard', - 'top': - 'var args = arguments,\n' + - ' argsIndex = 0,\n' + - " argsLength = typeof guard == 'number' ? 2 : args.length;\n" + - 'while (++argsIndex < argsLength) {\n' + - ' iterable = args[argsIndex];\n' + - ' if (iterable && objectTypes[typeof iterable]) {', - 'keys': keys, - 'loop': "if (typeof result[index] == 'undefined') result[index] = iterable[index]", - 'bottom': ' }\n}' - }; - - /** Reusable iterator options for `forIn` and `forOwn` */ - var forOwnIteratorOptions = { - 'top': 'if (!objectTypes[typeof iterable]) return result;\n' + eachIteratorOptions.top, - 'array': false - }; - - /** - * Used to convert characters to HTML entities: - * - * Though the `>` character is escaped for symmetry, characters like `>` and `/` - * don't require escaping in HTML and have no special meaning unless they're part - * of a tag or an unquoted attribute value. - * http://mathiasbynens.be/notes/ambiguous-ampersands (under "semi-related fun fact") - */ - var htmlEscapes = { - '&': '&', - '<': '<', - '>': '>', - '"': '"', - "'": ''' - }; - - /** Used to convert HTML entities to characters */ - var htmlUnescapes = invert(htmlEscapes); - - /** Used to match HTML entities and HTML characters */ - var reEscapedHtml = RegExp('(' + keys(htmlUnescapes).join('|') + ')', 'g'), - reUnescapedHtml = RegExp('[' + keys(htmlEscapes).join('') + ']', 'g'); - - /** - * A function compiled to iterate `arguments` objects, arrays, objects, and - * strings consistenly across environments, executing the callback for each - * element in the collection. The callback is bound to `thisArg` and invoked - * with three arguments; (value, index|key, collection). Callbacks may exit - * iteration early by explicitly returning `false`. - * - * @private - * @type Function - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array|Object|string} Returns `collection`. - */ - var baseEach = createIterator(eachIteratorOptions); - - /*--------------------------------------------------------------------------*/ - - /** - * Assigns own enumerable properties of source object(s) to the destination - * object. Subsequent sources will overwrite property assignments of previous - * sources. If a callback is provided it will be executed to produce the - * assigned values. The callback is bound to `thisArg` and invoked with two - * arguments; (objectValue, sourceValue). - * - * @static - * @memberOf _ - * @type Function - * @alias extend - * @category Objects - * @param {Object} object The destination object. - * @param {...Object} [source] The source objects. - * @param {Function} [callback] The function to customize assigning values. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the destination object. - * @example - * - * _.assign({ 'name': 'fred' }, { 'employer': 'slate' }); - * // => { 'name': 'fred', 'employer': 'slate' } - * - * var defaults = _.partialRight(_.assign, function(a, b) { - * return typeof a == 'undefined' ? b : a; - * }); - * - * var object = { 'name': 'barney' }; - * defaults(object, { 'name': 'fred', 'employer': 'slate' }); - * // => { 'name': 'barney', 'employer': 'slate' } - */ - var assign = createIterator(defaultsIteratorOptions, { - 'top': - defaultsIteratorOptions.top.replace(';', - ';\n' + - "if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {\n" + - ' var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);\n' + - "} else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {\n" + - ' callback = args[--argsLength];\n' + - '}' - ), - 'loop': 'result[index] = callback ? callback(result[index], iterable[index]) : iterable[index]' - }); - - /** - * Creates a clone of `value`. If `isDeep` is `true` nested objects will also - * be cloned, otherwise they will be assigned by reference. If a callback - * is provided it will be executed to produce the cloned values. If the - * callback returns `undefined` cloning will be handled by the method instead. - * The callback is bound to `thisArg` and invoked with one argument; (value). - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to clone. - * @param {boolean} [isDeep=false] Specify a deep clone. - * @param {Function} [callback] The function to customize cloning values. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the cloned value. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * var shallow = _.clone(characters); - * shallow[0] === characters[0]; - * // => true - * - * var deep = _.clone(characters, true); - * deep[0] === characters[0]; - * // => false - * - * _.mixin({ - * 'clone': _.partialRight(_.clone, function(value) { - * return _.isElement(value) ? value.cloneNode(false) : undefined; - * }) - * }); - * - * var clone = _.clone(document.body); - * clone.childNodes.length; - * // => 0 - */ - function clone(value, isDeep, callback, thisArg) { - // allows working with "Collections" methods without using their `index` - // and `collection` arguments for `isDeep` and `callback` - if (typeof isDeep != 'boolean' && isDeep != null) { - thisArg = callback; - callback = isDeep; - isDeep = false; - } - return baseClone(value, isDeep, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1)); - } - - /** - * Creates a deep clone of `value`. If a callback is provided it will be - * executed to produce the cloned values. If the callback returns `undefined` - * cloning will be handled by the method instead. The callback is bound to - * `thisArg` and invoked with one argument; (value). - * - * Note: This method is loosely based on the structured clone algorithm. Functions - * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and - * objects created by constructors other than `Object` are cloned to plain `Object` objects. - * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to deep clone. - * @param {Function} [callback] The function to customize cloning values. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the deep cloned value. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * var deep = _.cloneDeep(characters); - * deep[0] === characters[0]; - * // => false - * - * var view = { - * 'label': 'docs', - * 'node': element - * }; - * - * var clone = _.cloneDeep(view, function(value) { - * return _.isElement(value) ? value.cloneNode(true) : undefined; - * }); - * - * clone.node == view.node; - * // => false - */ - function cloneDeep(value, callback, thisArg) { - return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1)); - } - - /** - * Creates an object that inherits from the given `prototype` object. If a - * `properties` object is provided its own enumerable properties are assigned - * to the created object. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} prototype The object to inherit from. - * @param {Object} [properties] The properties to assign to the object. - * @returns {Object} Returns the new object. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * function Circle() { - * Shape.call(this); - * } - * - * Circle.prototype = _.create(Shape.prototype, { 'constructor': Circle }); - * - * var circle = new Circle; - * circle instanceof Circle; - * // => true - * - * circle instanceof Shape; - * // => true - */ - function create(prototype, properties) { - var result = baseCreate(prototype); - return properties ? assign(result, properties) : result; - } - - /** - * Assigns own enumerable properties of source object(s) to the destination - * object for all destination properties that resolve to `undefined`. Once a - * property is set, additional defaults of the same property will be ignored. - * - * @static - * @memberOf _ - * @type Function - * @category Objects - * @param {Object} object The destination object. - * @param {...Object} [source] The source objects. - * @param- {Object} [guard] Allows working with `_.reduce` without using its - * `key` and `object` arguments as sources. - * @returns {Object} Returns the destination object. - * @example - * - * var object = { 'name': 'barney' }; - * _.defaults(object, { 'name': 'fred', 'employer': 'slate' }); - * // => { 'name': 'barney', 'employer': 'slate' } - */ - var defaults = createIterator(defaultsIteratorOptions); - - /** - * This method is like `_.findIndex` except that it returns the key of the - * first element that passes the callback check, instead of the element itself. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to search. - * @param {Function|Object|string} [callback=identity] The function called per - * iteration. If a property name or object is provided it will be used to - * create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {string|undefined} Returns the key of the found element, else `undefined`. - * @example - * - * var characters = { - * 'barney': { 'age': 36, 'blocked': false }, - * 'fred': { 'age': 40, 'blocked': true }, - * 'pebbles': { 'age': 1, 'blocked': false } - * }; - * - * _.findKey(characters, function(chr) { - * return chr.age < 40; - * }); - * // => 'barney' (property order is not guaranteed across environments) - * - * // using "_.where" callback shorthand - * _.findKey(characters, { 'age': 1 }); - * // => 'pebbles' - * - * // using "_.pluck" callback shorthand - * _.findKey(characters, 'blocked'); - * // => 'fred' - */ - function findKey(object, callback, thisArg) { - var result; - callback = lodash.createCallback(callback, thisArg, 3); - forOwn(object, function(value, key, object) { - if (callback(value, key, object)) { - result = key; - return false; - } - }); - return result; - } - - /** - * This method is like `_.findKey` except that it iterates over elements - * of a `collection` in the opposite order. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to search. - * @param {Function|Object|string} [callback=identity] The function called per - * iteration. If a property name or object is provided it will be used to - * create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {string|undefined} Returns the key of the found element, else `undefined`. - * @example - * - * var characters = { - * 'barney': { 'age': 36, 'blocked': true }, - * 'fred': { 'age': 40, 'blocked': false }, - * 'pebbles': { 'age': 1, 'blocked': true } - * }; - * - * _.findLastKey(characters, function(chr) { - * return chr.age < 40; - * }); - * // => returns `pebbles`, assuming `_.findKey` returns `barney` - * - * // using "_.where" callback shorthand - * _.findLastKey(characters, { 'age': 40 }); - * // => 'fred' - * - * // using "_.pluck" callback shorthand - * _.findLastKey(characters, 'blocked'); - * // => 'pebbles' - */ - function findLastKey(object, callback, thisArg) { - var result; - callback = lodash.createCallback(callback, thisArg, 3); - forOwnRight(object, function(value, key, object) { - if (callback(value, key, object)) { - result = key; - return false; - } - }); - return result; - } - - /** - * Iterates over own and inherited enumerable properties of an object, - * executing the callback for each property. The callback is bound to `thisArg` - * and invoked with three arguments; (value, key, object). Callbacks may exit - * iteration early by explicitly returning `false`. - * - * @static - * @memberOf _ - * @type Function - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * Shape.prototype.move = function(x, y) { - * this.x += x; - * this.y += y; - * }; - * - * _.forIn(new Shape, function(value, key) { - * console.log(key); - * }); - * // => logs 'x', 'y', and 'move' (property order is not guaranteed across environments) - */ - var forIn = createIterator(eachIteratorOptions, forOwnIteratorOptions, { - 'useHas': false - }); - - /** - * This method is like `_.forIn` except that it iterates over elements - * of a `collection` in the opposite order. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * Shape.prototype.move = function(x, y) { - * this.x += x; - * this.y += y; - * }; - * - * _.forInRight(new Shape, function(value, key) { - * console.log(key); - * }); - * // => logs 'move', 'y', and 'x' assuming `_.forIn ` logs 'x', 'y', and 'move' - */ - function forInRight(object, callback, thisArg) { - var pairs = []; - - forIn(object, function(value, key) { - pairs.push(key, value); - }); - - var length = pairs.length; - callback = baseCreateCallback(callback, thisArg, 3); - while (length--) { - if (callback(pairs[length--], pairs[length], object) === false) { - break; - } - } - return object; - } - - /** - * Iterates over own enumerable properties of an object, executing the callback - * for each property. The callback is bound to `thisArg` and invoked with three - * arguments; (value, key, object). Callbacks may exit iteration early by - * explicitly returning `false`. - * - * @static - * @memberOf _ - * @type Function - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) { - * console.log(key); - * }); - * // => logs '0', '1', and 'length' (property order is not guaranteed across environments) - */ - var forOwn = createIterator(eachIteratorOptions, forOwnIteratorOptions); - - /** - * This method is like `_.forOwn` except that it iterates over elements - * of a `collection` in the opposite order. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * _.forOwnRight({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) { - * console.log(key); - * }); - * // => logs 'length', '1', and '0' assuming `_.forOwn` logs '0', '1', and 'length' - */ - function forOwnRight(object, callback, thisArg) { - var props = keys(object), - length = props.length; - - callback = baseCreateCallback(callback, thisArg, 3); - while (length--) { - var key = props[length]; - if (callback(object[key], key, object) === false) { - break; - } - } - return object; - } - - /** - * Creates a sorted array of property names of all enumerable properties, - * own and inherited, of `object` that have function values. - * - * @static - * @memberOf _ - * @alias methods - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns an array of property names that have function values. - * @example - * - * _.functions(_); - * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...] - */ - function functions(object) { - var result = []; - forIn(object, function(value, key) { - if (isFunction(value)) { - result.push(key); - } - }); - return result.sort(); - } - - /** - * Checks if the specified property name exists as a direct property of `object`, - * instead of an inherited property. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @param {string} key The name of the property to check. - * @returns {boolean} Returns `true` if key is a direct property, else `false`. - * @example - * - * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b'); - * // => true - */ - function has(object, key) { - return object ? hasOwnProperty.call(object, key) : false; - } - - /** - * Creates an object composed of the inverted keys and values of the given object. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to invert. - * @returns {Object} Returns the created inverted object. - * @example - * - * _.invert({ 'first': 'fred', 'second': 'barney' }); - * // => { 'fred': 'first', 'barney': 'second' } - */ - function invert(object) { - var index = -1, - props = keys(object), - length = props.length, - result = {}; - - while (++index < length) { - var key = props[index]; - result[object[key]] = key; - } - return result; - } - - /** - * Checks if `value` is a boolean value. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a boolean value, else `false`. - * @example - * - * _.isBoolean(null); - * // => false - */ - function isBoolean(value) { - return value === true || value === false || - value && typeof value == 'object' && toString.call(value) == boolClass || false; - } - - /** - * Checks if `value` is a date. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a date, else `false`. - * @example - * - * _.isDate(new Date); - * // => true - */ - function isDate(value) { - return value && typeof value == 'object' && toString.call(value) == dateClass || false; - } - - /** - * Checks if `value` is a DOM element. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a DOM element, else `false`. - * @example - * - * _.isElement(document.body); - * // => true - */ - function isElement(value) { - return value && value.nodeType === 1 || false; - } - - /** - * Checks if `value` is empty. Arrays, strings, or `arguments` objects with a - * length of `0` and objects with no own enumerable properties are considered - * "empty". - * - * @static - * @memberOf _ - * @category Objects - * @param {Array|Object|string} value The value to inspect. - * @returns {boolean} Returns `true` if the `value` is empty, else `false`. - * @example - * - * _.isEmpty([1, 2, 3]); - * // => false - * - * _.isEmpty({}); - * // => true - * - * _.isEmpty(''); - * // => true - */ - function isEmpty(value) { - var result = true; - if (!value) { - return result; - } - var className = toString.call(value), - length = value.length; - - if ((className == arrayClass || className == stringClass || - (support.argsClass ? className == argsClass : isArguments(value))) || - (className == objectClass && typeof length == 'number' && isFunction(value.splice))) { - return !length; - } - forOwn(value, function() { - return (result = false); - }); - return result; - } - - /** - * Performs a deep comparison between two values to determine if they are - * equivalent to each other. If a callback is provided it will be executed - * to compare values. If the callback returns `undefined` comparisons will - * be handled by the method instead. The callback is bound to `thisArg` and - * invoked with two arguments; (a, b). - * - * @static - * @memberOf _ - * @category Objects - * @param {*} a The value to compare. - * @param {*} b The other value to compare. - * @param {Function} [callback] The function to customize comparing values. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {boolean} Returns `true` if the values are equivalent, else `false`. - * @example - * - * var object = { 'name': 'fred' }; - * var copy = { 'name': 'fred' }; - * - * object == copy; - * // => false - * - * _.isEqual(object, copy); - * // => true - * - * var words = ['hello', 'goodbye']; - * var otherWords = ['hi', 'goodbye']; - * - * _.isEqual(words, otherWords, function(a, b) { - * var reGreet = /^(?:hello|hi)$/i, - * aGreet = _.isString(a) && reGreet.test(a), - * bGreet = _.isString(b) && reGreet.test(b); - * - * return (aGreet || bGreet) ? (aGreet == bGreet) : undefined; - * }); - * // => true - */ - function isEqual(a, b, callback, thisArg) { - return baseIsEqual(a, b, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 2)); - } - - /** - * Checks if `value` is, or can be coerced to, a finite number. - * - * Note: This is not the same as native `isFinite` which will return true for - * booleans and empty strings. See http://es5.github.io/#x15.1.2.5. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is finite, else `false`. - * @example - * - * _.isFinite(-101); - * // => true - * - * _.isFinite('10'); - * // => true - * - * _.isFinite(true); - * // => false - * - * _.isFinite(''); - * // => false - * - * _.isFinite(Infinity); - * // => false - */ - function isFinite(value) { - return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value)); - } - - /** - * Checks if `value` is a function. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a function, else `false`. - * @example - * - * _.isFunction(_); - * // => true - */ - function isFunction(value) { - return typeof value == 'function'; - } - // fallback for older versions of Chrome and Safari - if (isFunction(/x/)) { - isFunction = function(value) { - return typeof value == 'function' && toString.call(value) == funcClass; - }; - } - - /** - * Checks if `value` is the language type of Object. - * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is an object, else `false`. - * @example - * - * _.isObject({}); - * // => true - * - * _.isObject([1, 2, 3]); - * // => true - * - * _.isObject(1); - * // => false - */ - function isObject(value) { - // check if the value is the ECMAScript language type of Object - // http://es5.github.io/#x8 - // and avoid a V8 bug - // http://code.google.com/p/v8/issues/detail?id=2291 - return !!(value && objectTypes[typeof value]); - } - - /** - * Checks if `value` is `NaN`. - * - * Note: This is not the same as native `isNaN` which will return `true` for - * `undefined` and other non-numeric values. See http://es5.github.io/#x15.1.2.4. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is `NaN`, else `false`. - * @example - * - * _.isNaN(NaN); - * // => true - * - * _.isNaN(new Number(NaN)); - * // => true - * - * isNaN(undefined); - * // => true - * - * _.isNaN(undefined); - * // => false - */ - function isNaN(value) { - // `NaN` as a primitive is the only value that is not equal to itself - // (perform the [[Class]] check first to avoid errors with some host objects in IE) - return isNumber(value) && value != +value; - } - - /** - * Checks if `value` is `null`. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is `null`, else `false`. - * @example - * - * _.isNull(null); - * // => true - * - * _.isNull(undefined); - * // => false - */ - function isNull(value) { - return value === null; - } - - /** - * Checks if `value` is a number. - * - * Note: `NaN` is considered a number. See http://es5.github.io/#x8.5. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a number, else `false`. - * @example - * - * _.isNumber(8.4 * 5); - * // => true - */ - function isNumber(value) { - return typeof value == 'number' || - value && typeof value == 'object' && toString.call(value) == numberClass || false; - } - - /** - * Checks if `value` is an object created by the `Object` constructor. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a plain object, else `false`. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * _.isPlainObject(new Shape); - * // => false - * - * _.isPlainObject([1, 2, 3]); - * // => false - * - * _.isPlainObject({ 'x': 0, 'y': 0 }); - * // => true - */ - var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) { - if (!(value && toString.call(value) == objectClass) || (!support.argsClass && isArguments(value))) { - return false; - } - var valueOf = value.valueOf, - objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto); - - return objProto - ? (value == objProto || getPrototypeOf(value) == objProto) - : shimIsPlainObject(value); - }; - - /** - * Checks if `value` is a regular expression. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a regular expression, else `false`. - * @example - * - * _.isRegExp(/fred/); - * // => true - */ - function isRegExp(value) { - return value && objectTypes[typeof value] && toString.call(value) == regexpClass || false; - } - - /** - * Checks if `value` is a string. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a string, else `false`. - * @example - * - * _.isString('fred'); - * // => true - */ - function isString(value) { - return typeof value == 'string' || - value && typeof value == 'object' && toString.call(value) == stringClass || false; - } - - /** - * Checks if `value` is `undefined`. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is `undefined`, else `false`. - * @example - * - * _.isUndefined(void 0); - * // => true - */ - function isUndefined(value) { - return typeof value == 'undefined'; - } - - /** - * Creates an object with the same keys as `object` and values generated by - * running each own enumerable property of `object` through the callback. - * The callback is bound to `thisArg` and invoked with three arguments; - * (value, key, object). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new object with values of the results of each `callback` execution. - * @example - * - * _.mapValues({ 'a': 1, 'b': 2, 'c': 3} , function(num) { return num * 3; }); - * // => { 'a': 3, 'b': 6, 'c': 9 } - * - * var characters = { - * 'fred': { 'name': 'fred', 'age': 40 }, - * 'pebbles': { 'name': 'pebbles', 'age': 1 } - * }; - * - * // using "_.pluck" callback shorthand - * _.mapValues(characters, 'age'); - * // => { 'fred': 40, 'pebbles': 1 } - */ - function mapValues(object, callback, thisArg) { - var result = {}; - callback = lodash.createCallback(callback, thisArg, 3); - - forOwn(object, function(value, key, object) { - result[key] = callback(value, key, object); - }); - return result; - } - - /** - * Recursively merges own enumerable properties of the source object(s), that - * don't resolve to `undefined` into the destination object. Subsequent sources - * will overwrite property assignments of previous sources. If a callback is - * provided it will be executed to produce the merged values of the destination - * and source properties. If the callback returns `undefined` merging will - * be handled by the method instead. The callback is bound to `thisArg` and - * invoked with two arguments; (objectValue, sourceValue). - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The destination object. - * @param {...Object} [source] The source objects. - * @param {Function} [callback] The function to customize merging properties. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the destination object. - * @example - * - * var names = { - * 'characters': [ - * { 'name': 'barney' }, - * { 'name': 'fred' } - * ] - * }; - * - * var ages = { - * 'characters': [ - * { 'age': 36 }, - * { 'age': 40 } - * ] - * }; - * - * _.merge(names, ages); - * // => { 'characters': [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] } - * - * var food = { - * 'fruits': ['apple'], - * 'vegetables': ['beet'] - * }; - * - * var otherFood = { - * 'fruits': ['banana'], - * 'vegetables': ['carrot'] - * }; - * - * _.merge(food, otherFood, function(a, b) { - * return _.isArray(a) ? a.concat(b) : undefined; - * }); - * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] } - */ - function merge(object) { - var args = arguments, - length = 2; - - if (!isObject(object)) { - return object; - } - // allows working with `_.reduce` and `_.reduceRight` without using - // their `index` and `collection` arguments - if (typeof args[2] != 'number') { - length = args.length; - } - if (length > 3 && typeof args[length - 2] == 'function') { - var callback = baseCreateCallback(args[--length - 1], args[length--], 2); - } else if (length > 2 && typeof args[length - 1] == 'function') { - callback = args[--length]; - } - var sources = slice(arguments, 1, length), - index = -1, - stackA = getArray(), - stackB = getArray(); - - while (++index < length) { - baseMerge(object, sources[index], callback, stackA, stackB); - } - releaseArray(stackA); - releaseArray(stackB); - return object; - } - - /** - * Creates a shallow clone of `object` excluding the specified properties. - * Property names may be specified as individual arguments or as arrays of - * property names. If a callback is provided it will be executed for each - * property of `object` omitting the properties the callback returns truey - * for. The callback is bound to `thisArg` and invoked with three arguments; - * (value, key, object). - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The source object. - * @param {Function|...string|string[]} [callback] The properties to omit or the - * function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns an object without the omitted properties. - * @example - * - * _.omit({ 'name': 'fred', 'age': 40 }, 'age'); - * // => { 'name': 'fred' } - * - * _.omit({ 'name': 'fred', 'age': 40 }, function(value) { - * return typeof value == 'number'; - * }); - * // => { 'name': 'fred' } - */ - function omit(object, callback, thisArg) { - var result = {}; - if (typeof callback != 'function') { - var props = []; - forIn(object, function(value, key) { - props.push(key); - }); - props = baseDifference(props, baseFlatten(arguments, true, false, 1)); - - var index = -1, - length = props.length; - - while (++index < length) { - var key = props[index]; - result[key] = object[key]; - } - } else { - callback = lodash.createCallback(callback, thisArg, 3); - forIn(object, function(value, key, object) { - if (!callback(value, key, object)) { - result[key] = value; - } - }); - } - return result; - } - - /** - * Creates a two dimensional array of an object's key-value pairs, - * i.e. `[[key1, value1], [key2, value2]]`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns new array of key-value pairs. - * @example - * - * _.pairs({ 'barney': 36, 'fred': 40 }); - * // => [['barney', 36], ['fred', 40]] (property order is not guaranteed across environments) - */ - function pairs(object) { - var index = -1, - props = keys(object), - length = props.length, - result = Array(length); - - while (++index < length) { - var key = props[index]; - result[index] = [key, object[key]]; - } - return result; - } - - /** - * Creates a shallow clone of `object` composed of the specified properties. - * Property names may be specified as individual arguments or as arrays of - * property names. If a callback is provided it will be executed for each - * property of `object` picking the properties the callback returns truey - * for. The callback is bound to `thisArg` and invoked with three arguments; - * (value, key, object). - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The source object. - * @param {Function|...string|string[]} [callback] The function called per - * iteration or property names to pick, specified as individual property - * names or arrays of property names. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns an object composed of the picked properties. - * @example - * - * _.pick({ 'name': 'fred', '_userid': 'fred1' }, 'name'); - * // => { 'name': 'fred' } - * - * _.pick({ 'name': 'fred', '_userid': 'fred1' }, function(value, key) { - * return key.charAt(0) != '_'; - * }); - * // => { 'name': 'fred' } - */ - function pick(object, callback, thisArg) { - var result = {}; - if (typeof callback != 'function') { - var index = -1, - props = baseFlatten(arguments, true, false, 1), - length = isObject(object) ? props.length : 0; - - while (++index < length) { - var key = props[index]; - if (key in object) { - result[key] = object[key]; - } - } - } else { - callback = lodash.createCallback(callback, thisArg, 3); - forIn(object, function(value, key, object) { - if (callback(value, key, object)) { - result[key] = value; - } - }); - } - return result; - } - - /** - * An alternative to `_.reduce` this method transforms `object` to a new - * `accumulator` object which is the result of running each of its own - * enumerable properties through a callback, with each callback execution - * potentially mutating the `accumulator` object. The callback is bound to - * `thisArg` and invoked with four arguments; (accumulator, value, key, object). - * Callbacks may exit iteration early by explicitly returning `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Array|Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [accumulator] The custom accumulator value. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the accumulated value. - * @example - * - * var squares = _.transform([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], function(result, num) { - * num *= num; - * if (num % 2) { - * return result.push(num) < 3; - * } - * }); - * // => [1, 9, 25] - * - * var mapped = _.transform({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) { - * result[key] = num * 3; - * }); - * // => { 'a': 3, 'b': 6, 'c': 9 } - */ - function transform(object, callback, accumulator, thisArg) { - var isArr = isArray(object); - if (accumulator == null) { - if (isArr) { - accumulator = []; - } else { - var ctor = object && object.constructor, - proto = ctor && ctor.prototype; - - accumulator = baseCreate(proto); - } - } - if (callback) { - callback = lodash.createCallback(callback, thisArg, 4); - (isArr ? baseEach : forOwn)(object, function(value, index, object) { - return callback(accumulator, value, index, object); - }); - } - return accumulator; - } - - /** - * Creates an array composed of the own enumerable property values of `object`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns an array of property values. - * @example - * - * _.values({ 'one': 1, 'two': 2, 'three': 3 }); - * // => [1, 2, 3] (property order is not guaranteed across environments) - */ - function values(object) { - var index = -1, - props = keys(object), - length = props.length, - result = Array(length); - - while (++index < length) { - result[index] = object[props[index]]; - } - return result; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Creates an array of elements from the specified indexes, or keys, of the - * `collection`. Indexes may be specified as individual arguments or as arrays - * of indexes. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {...(number|number[]|string|string[])} [index] The indexes of `collection` - * to retrieve, specified as individual indexes or arrays of indexes. - * @returns {Array} Returns a new array of elements corresponding to the - * provided indexes. - * @example - * - * _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]); - * // => ['a', 'c', 'e'] - * - * _.at(['fred', 'barney', 'pebbles'], 0, 2); - * // => ['fred', 'pebbles'] - */ - function at(collection) { - var args = arguments, - index = -1, - props = baseFlatten(args, true, false, 1), - length = (args[2] && args[2][args[1]] === collection) ? 1 : props.length, - result = Array(length); - - if (support.unindexedChars && isString(collection)) { - collection = collection.split(''); - } - while(++index < length) { - result[index] = collection[props[index]]; - } - return result; - } - - /** - * Checks if a given value is present in a collection using strict equality - * for comparisons, i.e. `===`. If `fromIndex` is negative, it is used as the - * offset from the end of the collection. - * - * @static - * @memberOf _ - * @alias include - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {*} target The value to check for. - * @param {number} [fromIndex=0] The index to search from. - * @returns {boolean} Returns `true` if the `target` element is found, else `false`. - * @example - * - * _.contains([1, 2, 3], 1); - * // => true - * - * _.contains([1, 2, 3], 1, 2); - * // => false - * - * _.contains({ 'name': 'fred', 'age': 40 }, 'fred'); - * // => true - * - * _.contains('pebbles', 'eb'); - * // => true - */ - function contains(collection, target, fromIndex) { - var index = -1, - indexOf = getIndexOf(), - length = collection ? collection.length : 0, - result = false; - - fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0; - if (isArray(collection)) { - result = indexOf(collection, target, fromIndex) > -1; - } else if (typeof length == 'number') { - result = (isString(collection) ? collection.indexOf(target, fromIndex) : indexOf(collection, target, fromIndex)) > -1; - } else { - baseEach(collection, function(value) { - if (++index >= fromIndex) { - return !(result = value === target); - } - }); - } - return result; - } - - /** - * Creates an object composed of keys generated from the results of running - * each element of `collection` through the callback. The corresponding value - * of each key is the number of times the key was returned by the callback. - * The callback is bound to `thisArg` and invoked with three arguments; - * (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); }); - * // => { '4': 1, '6': 2 } - * - * _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math); - * // => { '4': 1, '6': 2 } - * - * _.countBy(['one', 'two', 'three'], 'length'); - * // => { '3': 2, '5': 1 } - */ - var countBy = createAggregator(function(result, value, key) { - (hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1); - }); - - /** - * Checks if the given callback returns truey value for **all** elements of - * a collection. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias all - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {boolean} Returns `true` if all elements passed the callback check, - * else `false`. - * @example - * - * _.every([true, 1, null, 'yes']); - * // => false - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * // using "_.pluck" callback shorthand - * _.every(characters, 'age'); - * // => true - * - * // using "_.where" callback shorthand - * _.every(characters, { 'age': 36 }); - * // => false - */ - function every(collection, callback, thisArg) { - var result = true; - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - if (!(result = !!callback(collection[index], index, collection))) { - break; - } - } - } else { - baseEach(collection, function(value, index, collection) { - return (result = !!callback(value, index, collection)); - }); - } - return result; - } - - /** - * Iterates over elements of a collection, returning an array of all elements - * the callback returns truey for. The callback is bound to `thisArg` and - * invoked with three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias select - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of elements that passed the callback check. - * @example - * - * var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; }); - * // => [2, 4, 6] - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true } - * ]; - * - * // using "_.pluck" callback shorthand - * _.filter(characters, 'blocked'); - * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }] - * - * // using "_.where" callback shorthand - * _.filter(characters, { 'age': 36 }); - * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }] - */ - function filter(collection, callback, thisArg) { - var result = []; - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - if (callback(value, index, collection)) { - result.push(value); - } - } - } else { - baseEach(collection, function(value, index, collection) { - if (callback(value, index, collection)) { - result.push(value); - } - }); - } - return result; - } - - /** - * Iterates over elements of a collection, returning the first element that - * the callback returns truey for. The callback is bound to `thisArg` and - * invoked with three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias detect, findWhere - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the found element, else `undefined`. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true }, - * { 'name': 'pebbles', 'age': 1, 'blocked': false } - * ]; - * - * _.find(characters, function(chr) { - * return chr.age < 40; - * }); - * // => { 'name': 'barney', 'age': 36, 'blocked': false } - * - * // using "_.where" callback shorthand - * _.find(characters, { 'age': 1 }); - * // => { 'name': 'pebbles', 'age': 1, 'blocked': false } - * - * // using "_.pluck" callback shorthand - * _.find(characters, 'blocked'); - * // => { 'name': 'fred', 'age': 40, 'blocked': true } - */ - function find(collection, callback, thisArg) { - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - if (callback(value, index, collection)) { - return value; - } - } - } else { - var result; - baseEach(collection, function(value, index, collection) { - if (callback(value, index, collection)) { - result = value; - return false; - } - }); - return result; - } - } - - /** - * This method is like `_.find` except that it iterates over elements - * of a `collection` from right to left. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the found element, else `undefined`. - * @example - * - * _.findLast([1, 2, 3, 4], function(num) { - * return num % 2 == 1; - * }); - * // => 3 - */ - function findLast(collection, callback, thisArg) { - var result; - callback = lodash.createCallback(callback, thisArg, 3); - forEachRight(collection, function(value, index, collection) { - if (callback(value, index, collection)) { - result = value; - return false; - } - }); - return result; - } - - /** - * Iterates over elements of a collection, executing the callback for each - * element. The callback is bound to `thisArg` and invoked with three arguments; - * (value, index|key, collection). Callbacks may exit iteration early by - * explicitly returning `false`. - * - * Note: As with other "Collections" methods, objects with a `length` property - * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn` - * may be used for object iteration. - * - * @static - * @memberOf _ - * @alias each - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array|Object|string} Returns `collection`. - * @example - * - * _([1, 2, 3]).forEach(function(num) { console.log(num); }).join(','); - * // => logs each number and returns '1,2,3' - * - * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { console.log(num); }); - * // => logs each number and returns the object (property order is not guaranteed across environments) - */ - function forEach(collection, callback, thisArg) { - if (callback && typeof thisArg == 'undefined' && isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - if (callback(collection[index], index, collection) === false) { - break; - } - } - } else { - baseEach(collection, callback, thisArg); - } - return collection; - } - - /** - * This method is like `_.forEach` except that it iterates over elements - * of a `collection` from right to left. - * - * @static - * @memberOf _ - * @alias eachRight - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array|Object|string} Returns `collection`. - * @example - * - * _([1, 2, 3]).forEachRight(function(num) { console.log(num); }).join(','); - * // => logs each number from right to left and returns '3,2,1' - */ - function forEachRight(collection, callback, thisArg) { - var iterable = collection, - length = collection ? collection.length : 0; - - callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3); - if (isArray(collection)) { - while (length--) { - if (callback(collection[length], length, collection) === false) { - break; - } - } - } else { - if (typeof length != 'number') { - var props = keys(collection); - length = props.length; - } else if (support.unindexedChars && isString(collection)) { - iterable = collection.split(''); - } - baseEach(collection, function(value, key, collection) { - key = props ? props[--length] : --length; - return callback(iterable[key], key, collection); - }); - } - return collection; - } - - /** - * Creates an object composed of keys generated from the results of running - * each element of a collection through the callback. The corresponding value - * of each key is an array of the elements responsible for generating the key. - * The callback is bound to `thisArg` and invoked with three arguments; - * (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false` - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); }); - * // => { '4': [4.2], '6': [6.1, 6.4] } - * - * _.groupBy([4.2, 6.1, 6.4], function(num) { return this.floor(num); }, Math); - * // => { '4': [4.2], '6': [6.1, 6.4] } - * - * // using "_.pluck" callback shorthand - * _.groupBy(['one', 'two', 'three'], 'length'); - * // => { '3': ['one', 'two'], '5': ['three'] } - */ - var groupBy = createAggregator(function(result, value, key) { - (hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value); - }); - - /** - * Creates an object composed of keys generated from the results of running - * each element of the collection through the given callback. The corresponding - * value of each key is the last element responsible for generating the key. - * The callback is bound to `thisArg` and invoked with three arguments; - * (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * var keys = [ - * { 'dir': 'left', 'code': 97 }, - * { 'dir': 'right', 'code': 100 } - * ]; - * - * _.indexBy(keys, 'dir'); - * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } } - * - * _.indexBy(keys, function(key) { return String.fromCharCode(key.code); }); - * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } - * - * _.indexBy(characters, function(key) { this.fromCharCode(key.code); }, String); - * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } - */ - var indexBy = createAggregator(function(result, value, key) { - result[key] = value; - }); - - /** - * Invokes the method named by `methodName` on each element in the `collection` - * returning an array of the results of each invoked method. Additional arguments - * will be provided to each invoked method. If `methodName` is a function it - * will be invoked for, and `this` bound to, each element in the `collection`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|string} methodName The name of the method to invoke or - * the function invoked per iteration. - * @param {...*} [arg] Arguments to invoke the method with. - * @returns {Array} Returns a new array of the results of each invoked method. - * @example - * - * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort'); - * // => [[1, 5, 7], [1, 2, 3]] - * - * _.invoke([123, 456], String.prototype.split, ''); - * // => [['1', '2', '3'], ['4', '5', '6']] - */ - function invoke(collection, methodName) { - var args = slice(arguments, 2), - index = -1, - isFunc = typeof methodName == 'function', - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); - - forEach(collection, function(value) { - result[++index] = (isFunc ? methodName : value[methodName]).apply(value, args); - }); - return result; - } - - /** - * Creates an array of values by running each element in the collection - * through the callback. The callback is bound to `thisArg` and invoked with - * three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias collect - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of the results of each `callback` execution. - * @example - * - * _.map([1, 2, 3], function(num) { return num * 3; }); - * // => [3, 6, 9] - * - * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; }); - * // => [3, 6, 9] (property order is not guaranteed across environments) - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * // using "_.pluck" callback shorthand - * _.map(characters, 'name'); - * // => ['barney', 'fred'] - */ - function map(collection, callback, thisArg) { - var index = -1, - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); - - callback = lodash.createCallback(callback, thisArg, 3); - if (isArray(collection)) { - while (++index < length) { - result[index] = callback(collection[index], index, collection); - } - } else { - baseEach(collection, function(value, key, collection) { - result[++index] = callback(value, key, collection); - }); - } - return result; - } - - /** - * Retrieves the maximum value of a collection. If the collection is empty or - * falsey `-Infinity` is returned. If a callback is provided it will be executed - * for each value in the collection to generate the criterion by which the value - * is ranked. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the maximum value. - * @example - * - * _.max([4, 2, 8, 6]); - * // => 8 - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * _.max(characters, function(chr) { return chr.age; }); - * // => { 'name': 'fred', 'age': 40 }; - * - * // using "_.pluck" callback shorthand - * _.max(characters, 'age'); - * // => { 'name': 'fred', 'age': 40 }; - */ - function max(collection, callback, thisArg) { - var computed = -Infinity, - result = computed; - - // allows working with functions like `_.map` without using - // their `index` argument as a callback - if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) { - callback = null; - } - if (callback == null && isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - if (value > result) { - result = value; - } - } - } else { - callback = (callback == null && isString(collection)) - ? charAtCallback - : lodash.createCallback(callback, thisArg, 3); - - baseEach(collection, function(value, index, collection) { - var current = callback(value, index, collection); - if (current > computed) { - computed = current; - result = value; - } - }); - } - return result; - } - - /** - * Retrieves the minimum value of a collection. If the collection is empty or - * falsey `Infinity` is returned. If a callback is provided it will be executed - * for each value in the collection to generate the criterion by which the value - * is ranked. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the minimum value. - * @example - * - * _.min([4, 2, 8, 6]); - * // => 2 - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * _.min(characters, function(chr) { return chr.age; }); - * // => { 'name': 'barney', 'age': 36 }; - * - * // using "_.pluck" callback shorthand - * _.min(characters, 'age'); - * // => { 'name': 'barney', 'age': 36 }; - */ - function min(collection, callback, thisArg) { - var computed = Infinity, - result = computed; - - // allows working with functions like `_.map` without using - // their `index` argument as a callback - if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) { - callback = null; - } - if (callback == null && isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - if (value < result) { - result = value; - } - } - } else { - callback = (callback == null && isString(collection)) - ? charAtCallback - : lodash.createCallback(callback, thisArg, 3); - - baseEach(collection, function(value, index, collection) { - var current = callback(value, index, collection); - if (current < computed) { - computed = current; - result = value; - } - }); - } - return result; - } - - /** - * Retrieves the value of a specified property from all elements in the collection. - * - * @static - * @memberOf _ - * @type Function - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {string} property The name of the property to pluck. - * @returns {Array} Returns a new array of property values. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * _.pluck(characters, 'name'); - * // => ['barney', 'fred'] - */ - var pluck = map; - - /** - * Reduces a collection to a value which is the accumulated result of running - * each element in the collection through the callback, where each successive - * callback execution consumes the return value of the previous execution. If - * `accumulator` is not provided the first element of the collection will be - * used as the initial `accumulator` value. The callback is bound to `thisArg` - * and invoked with four arguments; (accumulator, value, index|key, collection). - * - * @static - * @memberOf _ - * @alias foldl, inject - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [accumulator] Initial value of the accumulator. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the accumulated value. - * @example - * - * var sum = _.reduce([1, 2, 3], function(sum, num) { - * return sum + num; - * }); - * // => 6 - * - * var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) { - * result[key] = num * 3; - * return result; - * }, {}); - * // => { 'a': 3, 'b': 6, 'c': 9 } - */ - function reduce(collection, callback, accumulator, thisArg) { - var noaccum = arguments.length < 3; - callback = lodash.createCallback(callback, thisArg, 4); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - if (noaccum) { - accumulator = collection[++index]; - } - while (++index < length) { - accumulator = callback(accumulator, collection[index], index, collection); - } - } else { - baseEach(collection, function(value, index, collection) { - accumulator = noaccum - ? (noaccum = false, value) - : callback(accumulator, value, index, collection) - }); - } - return accumulator; - } - - /** - * This method is like `_.reduce` except that it iterates over elements - * of a `collection` from right to left. - * - * @static - * @memberOf _ - * @alias foldr - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [accumulator] Initial value of the accumulator. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the accumulated value. - * @example - * - * var list = [[0, 1], [2, 3], [4, 5]]; - * var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []); - * // => [4, 5, 2, 3, 0, 1] - */ - function reduceRight(collection, callback, accumulator, thisArg) { - var noaccum = arguments.length < 3; - callback = lodash.createCallback(callback, thisArg, 4); - forEachRight(collection, function(value, index, collection) { - accumulator = noaccum - ? (noaccum = false, value) - : callback(accumulator, value, index, collection); - }); - return accumulator; - } - - /** - * The opposite of `_.filter` this method returns the elements of a - * collection that the callback does **not** return truey for. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of elements that failed the callback check. - * @example - * - * var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; }); - * // => [1, 3, 5] - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true } - * ]; - * - * // using "_.pluck" callback shorthand - * _.reject(characters, 'blocked'); - * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }] - * - * // using "_.where" callback shorthand - * _.reject(characters, { 'age': 36 }); - * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }] - */ - function reject(collection, callback, thisArg) { - callback = lodash.createCallback(callback, thisArg, 3); - return filter(collection, function(value, index, collection) { - return !callback(value, index, collection); - }); - } - - /** - * Retrieves a random element or `n` random elements from a collection. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to sample. - * @param {number} [n] The number of elements to sample. - * @param- {Object} [guard] Allows working with functions like `_.map` - * without using their `index` arguments as `n`. - * @returns {Array} Returns the random sample(s) of `collection`. - * @example - * - * _.sample([1, 2, 3, 4]); - * // => 2 - * - * _.sample([1, 2, 3, 4], 2); - * // => [3, 1] - */ - function sample(collection, n, guard) { - if (collection && typeof collection.length != 'number') { - collection = values(collection); - } else if (support.unindexedChars && isString(collection)) { - collection = collection.split(''); - } - if (n == null || guard) { - return collection ? collection[baseRandom(0, collection.length - 1)] : undefined; - } - var result = shuffle(collection); - result.length = nativeMin(nativeMax(0, n), result.length); - return result; - } - - /** - * Creates an array of shuffled values, using a version of the Fisher-Yates - * shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to shuffle. - * @returns {Array} Returns a new shuffled collection. - * @example - * - * _.shuffle([1, 2, 3, 4, 5, 6]); - * // => [4, 1, 6, 3, 5, 2] - */ - function shuffle(collection) { - var index = -1, - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); - - forEach(collection, function(value) { - var rand = baseRandom(0, ++index); - result[index] = result[rand]; - result[rand] = value; - }); - return result; - } - - /** - * Gets the size of the `collection` by returning `collection.length` for arrays - * and array-like objects or the number of own enumerable properties for objects. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to inspect. - * @returns {number} Returns `collection.length` or number of own enumerable properties. - * @example - * - * _.size([1, 2]); - * // => 2 - * - * _.size({ 'one': 1, 'two': 2, 'three': 3 }); - * // => 3 - * - * _.size('pebbles'); - * // => 7 - */ - function size(collection) { - var length = collection ? collection.length : 0; - return typeof length == 'number' ? length : keys(collection).length; - } - - /** - * Checks if the callback returns a truey value for **any** element of a - * collection. The function returns as soon as it finds a passing value and - * does not iterate over the entire collection. The callback is bound to - * `thisArg` and invoked with three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias any - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {boolean} Returns `true` if any element passed the callback check, - * else `false`. - * @example - * - * _.some([null, 0, 'yes', false], Boolean); - * // => true - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true } - * ]; - * - * // using "_.pluck" callback shorthand - * _.some(characters, 'blocked'); - * // => true - * - * // using "_.where" callback shorthand - * _.some(characters, { 'age': 1 }); - * // => false - */ - function some(collection, callback, thisArg) { - var result; - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - if ((result = callback(collection[index], index, collection))) { - break; - } - } - } else { - baseEach(collection, function(value, index, collection) { - return !(result = callback(value, index, collection)); - }); - } - return !!result; - } - - /** - * Creates an array of elements, sorted in ascending order by the results of - * running each element in a collection through the callback. This method - * performs a stable sort, that is, it will preserve the original sort order - * of equal elements. The callback is bound to `thisArg` and invoked with - * three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an array of property names is provided for `callback` the collection - * will be sorted by each property value. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Array|Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of sorted elements. - * @example - * - * _.sortBy([1, 2, 3], function(num) { return Math.sin(num); }); - * // => [3, 1, 2] - * - * _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math); - * // => [3, 1, 2] - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 }, - * { 'name': 'barney', 'age': 26 }, - * { 'name': 'fred', 'age': 30 } - * ]; - * - * // using "_.pluck" callback shorthand - * _.map(_.sortBy(characters, 'age'), _.values); - * // => [['barney', 26], ['fred', 30], ['barney', 36], ['fred', 40]] - * - * // sorting by multiple properties - * _.map(_.sortBy(characters, ['name', 'age']), _.values); - * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]] - */ - function sortBy(collection, callback, thisArg) { - var index = -1, - isArr = isArray(callback), - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); - - if (!isArr) { - callback = lodash.createCallback(callback, thisArg, 3); - } - forEach(collection, function(value, key, collection) { - var object = result[++index] = getObject(); - if (isArr) { - object.criteria = map(callback, function(key) { return value[key]; }); - } else { - (object.criteria = getArray())[0] = callback(value, key, collection); - } - object.index = index; - object.value = value; - }); - - length = result.length; - result.sort(compareAscending); - while (length--) { - var object = result[length]; - result[length] = object.value; - if (!isArr) { - releaseArray(object.criteria); - } - releaseObject(object); - } - return result; - } - - /** - * Converts the `collection` to an array. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to convert. - * @returns {Array} Returns the new converted array. - * @example - * - * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4); - * // => [2, 3, 4] - */ - function toArray(collection) { - if (collection && typeof collection.length == 'number') { - return (support.unindexedChars && isString(collection)) - ? collection.split('') - : slice(collection); - } - return values(collection); - } - - /** - * Performs a deep comparison of each element in a `collection` to the given - * `properties` object, returning an array of all elements that have equivalent - * property values. - * - * @static - * @memberOf _ - * @type Function - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Object} props The object of property values to filter by. - * @returns {Array} Returns a new array of elements that have the given properties. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }, - * { 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] } - * ]; - * - * _.where(characters, { 'age': 36 }); - * // => [{ 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }] - * - * _.where(characters, { 'pets': ['dino'] }); - * // => [{ 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }] - */ - var where = filter; - - /*--------------------------------------------------------------------------*/ - - /** - * Creates an array with all falsey values removed. The values `false`, `null`, - * `0`, `""`, `undefined`, and `NaN` are all falsey. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to compact. - * @returns {Array} Returns a new array of filtered values. - * @example - * - * _.compact([0, 1, false, 2, '', 3]); - * // => [1, 2, 3] - */ - function compact(array) { - var index = -1, - length = array ? array.length : 0, - result = []; - - while (++index < length) { - var value = array[index]; - if (value) { - result.push(value); - } - } - return result; - } - - /** - * Creates an array excluding all values of the provided arrays using strict - * equality for comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to process. - * @param {...Array} [values] The arrays of values to exclude. - * @returns {Array} Returns a new array of filtered values. - * @example - * - * _.difference([1, 2, 3, 4, 5], [5, 2, 10]); - * // => [1, 3, 4] - */ - function difference(array) { - return baseDifference(array, baseFlatten(arguments, true, true, 1)); - } - - /** - * This method is like `_.find` except that it returns the index of the first - * element that passes the callback check, instead of the element itself. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {number} Returns the index of the found element, else `-1`. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true }, - * { 'name': 'pebbles', 'age': 1, 'blocked': false } - * ]; - * - * _.findIndex(characters, function(chr) { - * return chr.age < 20; - * }); - * // => 2 - * - * // using "_.where" callback shorthand - * _.findIndex(characters, { 'age': 36 }); - * // => 0 - * - * // using "_.pluck" callback shorthand - * _.findIndex(characters, 'blocked'); - * // => 1 - */ - function findIndex(array, callback, thisArg) { - var index = -1, - length = array ? array.length : 0; - - callback = lodash.createCallback(callback, thisArg, 3); - while (++index < length) { - if (callback(array[index], index, array)) { - return index; - } - } - return -1; - } - - /** - * This method is like `_.findIndex` except that it iterates over elements - * of a `collection` from right to left. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {number} Returns the index of the found element, else `-1`. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': true }, - * { 'name': 'fred', 'age': 40, 'blocked': false }, - * { 'name': 'pebbles', 'age': 1, 'blocked': true } - * ]; - * - * _.findLastIndex(characters, function(chr) { - * return chr.age > 30; - * }); - * // => 1 - * - * // using "_.where" callback shorthand - * _.findLastIndex(characters, { 'age': 36 }); - * // => 0 - * - * // using "_.pluck" callback shorthand - * _.findLastIndex(characters, 'blocked'); - * // => 2 - */ - function findLastIndex(array, callback, thisArg) { - var length = array ? array.length : 0; - callback = lodash.createCallback(callback, thisArg, 3); - while (length--) { - if (callback(array[length], length, array)) { - return length; - } - } - return -1; - } - - /** - * Gets the first element or first `n` elements of an array. If a callback - * is provided elements at the beginning of the array are returned as long - * as the callback returns truey. The callback is bound to `thisArg` and - * invoked with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias head, take - * @category Arrays - * @param {Array} array The array to query. - * @param {Function|Object|number|string} [callback] The function called - * per element or the number of elements to return. If a property name or - * object is provided it will be used to create a "_.pluck" or "_.where" - * style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the first element(s) of `array`. - * @example - * - * _.first([1, 2, 3]); - * // => 1 - * - * _.first([1, 2, 3], 2); - * // => [1, 2] - * - * _.first([1, 2, 3], function(num) { - * return num < 3; - * }); - * // => [1, 2] - * - * var characters = [ - * { 'name': 'barney', 'blocked': true, 'employer': 'slate' }, - * { 'name': 'fred', 'blocked': false, 'employer': 'slate' }, - * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' } - * ]; - * - * // using "_.pluck" callback shorthand - * _.first(characters, 'blocked'); - * // => [{ 'name': 'barney', 'blocked': true, 'employer': 'slate' }] - * - * // using "_.where" callback shorthand - * _.pluck(_.first(characters, { 'employer': 'slate' }), 'name'); - * // => ['barney', 'fred'] - */ - function first(array, callback, thisArg) { - var n = 0, - length = array ? array.length : 0; - - if (typeof callback != 'number' && callback != null) { - var index = -1; - callback = lodash.createCallback(callback, thisArg, 3); - while (++index < length && callback(array[index], index, array)) { - n++; - } - } else { - n = callback; - if (n == null || thisArg) { - return array ? array[0] : undefined; - } - } - return slice(array, 0, nativeMin(nativeMax(0, n), length)); - } - - /** - * Flattens a nested array (the nesting can be to any depth). If `isShallow` - * is truey, the array will only be flattened a single level. If a callback - * is provided each element of the array is passed through the callback before - * flattening. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to flatten. - * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new flattened array. - * @example - * - * _.flatten([1, [2], [3, [[4]]]]); - * // => [1, 2, 3, 4]; - * - * _.flatten([1, [2], [3, [[4]]]], true); - * // => [1, 2, 3, [[4]]]; - * - * var characters = [ - * { 'name': 'barney', 'age': 30, 'pets': ['hoppy'] }, - * { 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] } - * ]; - * - * // using "_.pluck" callback shorthand - * _.flatten(characters, 'pets'); - * // => ['hoppy', 'baby puss', 'dino'] - */ - function flatten(array, isShallow, callback, thisArg) { - // juggle arguments - if (typeof isShallow != 'boolean' && isShallow != null) { - thisArg = callback; - callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow; - isShallow = false; - } - if (callback != null) { - array = map(array, callback, thisArg); - } - return baseFlatten(array, isShallow); - } - - /** - * Gets the index at which the first occurrence of `value` is found using - * strict equality for comparisons, i.e. `===`. If the array is already sorted - * providing `true` for `fromIndex` will run a faster binary search. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {*} value The value to search for. - * @param {boolean|number} [fromIndex=0] The index to search from or `true` - * to perform a binary search on a sorted array. - * @returns {number} Returns the index of the matched value or `-1`. - * @example - * - * _.indexOf([1, 2, 3, 1, 2, 3], 2); - * // => 1 - * - * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3); - * // => 4 - * - * _.indexOf([1, 1, 2, 2, 3, 3], 2, true); - * // => 2 - */ - function indexOf(array, value, fromIndex) { - if (typeof fromIndex == 'number') { - var length = array ? array.length : 0; - fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0); - } else if (fromIndex) { - var index = sortedIndex(array, value); - return array[index] === value ? index : -1; - } - return baseIndexOf(array, value, fromIndex); - } - - /** - * Gets all but the last element or last `n` elements of an array. If a - * callback is provided elements at the end of the array are excluded from - * the result as long as the callback returns truey. The callback is bound - * to `thisArg` and invoked with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to query. - * @param {Function|Object|number|string} [callback=1] The function called - * per element or the number of elements to exclude. If a property name or - * object is provided it will be used to create a "_.pluck" or "_.where" - * style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a slice of `array`. - * @example - * - * _.initial([1, 2, 3]); - * // => [1, 2] - * - * _.initial([1, 2, 3], 2); - * // => [1] - * - * _.initial([1, 2, 3], function(num) { - * return num > 1; - * }); - * // => [1] - * - * var characters = [ - * { 'name': 'barney', 'blocked': false, 'employer': 'slate' }, - * { 'name': 'fred', 'blocked': true, 'employer': 'slate' }, - * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' } - * ]; - * - * // using "_.pluck" callback shorthand - * _.initial(characters, 'blocked'); - * // => [{ 'name': 'barney', 'blocked': false, 'employer': 'slate' }] - * - * // using "_.where" callback shorthand - * _.pluck(_.initial(characters, { 'employer': 'na' }), 'name'); - * // => ['barney', 'fred'] - */ - function initial(array, callback, thisArg) { - var n = 0, - length = array ? array.length : 0; - - if (typeof callback != 'number' && callback != null) { - var index = length; - callback = lodash.createCallback(callback, thisArg, 3); - while (index-- && callback(array[index], index, array)) { - n++; - } - } else { - n = (callback == null || thisArg) ? 1 : callback || n; - } - return slice(array, 0, nativeMin(nativeMax(0, length - n), length)); - } - - /** - * Creates an array of unique values present in all provided arrays using - * strict equality for comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {...Array} [array] The arrays to inspect. - * @returns {Array} Returns an array of shared values. - * @example - * - * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]); - * // => [1, 2] - */ - function intersection() { - var args = [], - argsIndex = -1, - argsLength = arguments.length, - caches = getArray(), - indexOf = getIndexOf(), - trustIndexOf = indexOf === baseIndexOf, - seen = getArray(); - - while (++argsIndex < argsLength) { - var value = arguments[argsIndex]; - if (isArray(value) || isArguments(value)) { - args.push(value); - caches.push(trustIndexOf && value.length >= largeArraySize && - createCache(argsIndex ? args[argsIndex] : seen)); - } - } - var array = args[0], - index = -1, - length = array ? array.length : 0, - result = []; - - outer: - while (++index < length) { - var cache = caches[0]; - value = array[index]; - - if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) { - argsIndex = argsLength; - (cache || seen).push(value); - while (--argsIndex) { - cache = caches[argsIndex]; - if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) { - continue outer; - } - } - result.push(value); - } - } - while (argsLength--) { - cache = caches[argsLength]; - if (cache) { - releaseObject(cache); - } - } - releaseArray(caches); - releaseArray(seen); - return result; - } - - /** - * Gets the last element or last `n` elements of an array. If a callback is - * provided elements at the end of the array are returned as long as the - * callback returns truey. The callback is bound to `thisArg` and invoked - * with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to query. - * @param {Function|Object|number|string} [callback] The function called - * per element or the number of elements to return. If a property name or - * object is provided it will be used to create a "_.pluck" or "_.where" - * style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the last element(s) of `array`. - * @example - * - * _.last([1, 2, 3]); - * // => 3 - * - * _.last([1, 2, 3], 2); - * // => [2, 3] - * - * _.last([1, 2, 3], function(num) { - * return num > 1; - * }); - * // => [2, 3] - * - * var characters = [ - * { 'name': 'barney', 'blocked': false, 'employer': 'slate' }, - * { 'name': 'fred', 'blocked': true, 'employer': 'slate' }, - * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' } - * ]; - * - * // using "_.pluck" callback shorthand - * _.pluck(_.last(characters, 'blocked'), 'name'); - * // => ['fred', 'pebbles'] - * - * // using "_.where" callback shorthand - * _.last(characters, { 'employer': 'na' }); - * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }] - */ - function last(array, callback, thisArg) { - var n = 0, - length = array ? array.length : 0; - - if (typeof callback != 'number' && callback != null) { - var index = length; - callback = lodash.createCallback(callback, thisArg, 3); - while (index-- && callback(array[index], index, array)) { - n++; - } - } else { - n = callback; - if (n == null || thisArg) { - return array ? array[length - 1] : undefined; - } - } - return slice(array, nativeMax(0, length - n)); - } - - /** - * Gets the index at which the last occurrence of `value` is found using strict - * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used - * as the offset from the end of the collection. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {*} value The value to search for. - * @param {number} [fromIndex=array.length-1] The index to search from. - * @returns {number} Returns the index of the matched value or `-1`. - * @example - * - * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2); - * // => 4 - * - * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3); - * // => 1 - */ - function lastIndexOf(array, value, fromIndex) { - var index = array ? array.length : 0; - if (typeof fromIndex == 'number') { - index = (fromIndex < 0 ? nativeMax(0, index + fromIndex) : nativeMin(fromIndex, index - 1)) + 1; - } - while (index--) { - if (array[index] === value) { - return index; - } - } - return -1; - } - - /** - * Removes all provided values from the given array using strict equality for - * comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to modify. - * @param {...*} [value] The values to remove. - * @returns {Array} Returns `array`. - * @example - * - * var array = [1, 2, 3, 1, 2, 3]; - * _.pull(array, 2, 3); - * console.log(array); - * // => [1, 1] - */ - function pull(array) { - var args = arguments, - argsIndex = 0, - argsLength = args.length, - length = array ? array.length : 0; - - while (++argsIndex < argsLength) { - var index = -1, - value = args[argsIndex]; - while (++index < length) { - if (array[index] === value) { - splice.call(array, index--, 1); - length--; - } - } - } - return array; - } - - /** - * Creates an array of numbers (positive and/or negative) progressing from - * `start` up to but not including `end`. If `start` is less than `stop` a - * zero-length range is created unless a negative `step` is specified. - * - * @static - * @memberOf _ - * @category Arrays - * @param {number} [start=0] The start of the range. - * @param {number} end The end of the range. - * @param {number} [step=1] The value to increment or decrement by. - * @returns {Array} Returns a new range array. - * @example - * - * _.range(4); - * // => [0, 1, 2, 3] - * - * _.range(1, 5); - * // => [1, 2, 3, 4] - * - * _.range(0, 20, 5); - * // => [0, 5, 10, 15] - * - * _.range(0, -4, -1); - * // => [0, -1, -2, -3] - * - * _.range(1, 4, 0); - * // => [1, 1, 1] - * - * _.range(0); - * // => [] - */ - function range(start, end, step) { - start = +start || 0; - step = typeof step == 'number' ? step : (+step || 1); - - if (end == null) { - end = start; - start = 0; - } - // use `Array(length)` so engines like Chakra and V8 avoid slower modes - // http://youtu.be/XAqIpGU8ZZk#t=17m25s - var index = -1, - length = nativeMax(0, ceil((end - start) / (step || 1))), - result = Array(length); - - while (++index < length) { - result[index] = start; - start += step; - } - return result; - } - - /** - * Removes all elements from an array that the callback returns truey for - * and returns an array of removed elements. The callback is bound to `thisArg` - * and invoked with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to modify. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of removed elements. - * @example - * - * var array = [1, 2, 3, 4, 5, 6]; - * var evens = _.remove(array, function(num) { return num % 2 == 0; }); - * - * console.log(array); - * // => [1, 3, 5] - * - * console.log(evens); - * // => [2, 4, 6] - */ - function remove(array, callback, thisArg) { - var index = -1, - length = array ? array.length : 0, - result = []; - - callback = lodash.createCallback(callback, thisArg, 3); - while (++index < length) { - var value = array[index]; - if (callback(value, index, array)) { - result.push(value); - splice.call(array, index--, 1); - length--; - } - } - return result; - } - - /** - * The opposite of `_.initial` this method gets all but the first element or - * first `n` elements of an array. If a callback function is provided elements - * at the beginning of the array are excluded from the result as long as the - * callback returns truey. The callback is bound to `thisArg` and invoked - * with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias drop, tail - * @category Arrays - * @param {Array} array The array to query. - * @param {Function|Object|number|string} [callback=1] The function called - * per element or the number of elements to exclude. If a property name or - * object is provided it will be used to create a "_.pluck" or "_.where" - * style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a slice of `array`. - * @example - * - * _.rest([1, 2, 3]); - * // => [2, 3] - * - * _.rest([1, 2, 3], 2); - * // => [3] - * - * _.rest([1, 2, 3], function(num) { - * return num < 3; - * }); - * // => [3] - * - * var characters = [ - * { 'name': 'barney', 'blocked': true, 'employer': 'slate' }, - * { 'name': 'fred', 'blocked': false, 'employer': 'slate' }, - * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' } - * ]; - * - * // using "_.pluck" callback shorthand - * _.pluck(_.rest(characters, 'blocked'), 'name'); - * // => ['fred', 'pebbles'] - * - * // using "_.where" callback shorthand - * _.rest(characters, { 'employer': 'slate' }); - * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }] - */ - function rest(array, callback, thisArg) { - if (typeof callback != 'number' && callback != null) { - var n = 0, - index = -1, - length = array ? array.length : 0; - - callback = lodash.createCallback(callback, thisArg, 3); - while (++index < length && callback(array[index], index, array)) { - n++; - } - } else { - n = (callback == null || thisArg) ? 1 : nativeMax(0, callback); - } - return slice(array, n); - } - - /** - * Uses a binary search to determine the smallest index at which a value - * should be inserted into a given sorted array in order to maintain the sort - * order of the array. If a callback is provided it will be executed for - * `value` and each element of `array` to compute their sort ranking. The - * callback is bound to `thisArg` and invoked with one argument; (value). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to inspect. - * @param {*} value The value to evaluate. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {number} Returns the index at which `value` should be inserted - * into `array`. - * @example - * - * _.sortedIndex([20, 30, 50], 40); - * // => 2 - * - * // using "_.pluck" callback shorthand - * _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x'); - * // => 2 - * - * var dict = { - * 'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 } - * }; - * - * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) { - * return dict.wordToNumber[word]; - * }); - * // => 2 - * - * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) { - * return this.wordToNumber[word]; - * }, dict); - * // => 2 - */ - function sortedIndex(array, value, callback, thisArg) { - var low = 0, - high = array ? array.length : low; - - // explicitly reference `identity` for better inlining in Firefox - callback = callback ? lodash.createCallback(callback, thisArg, 1) : identity; - value = callback(value); - - while (low < high) { - var mid = (low + high) >>> 1; - (callback(array[mid]) < value) - ? low = mid + 1 - : high = mid; - } - return low; - } - - /** - * Creates an array of unique values, in order, of the provided arrays using - * strict equality for comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {...Array} [array] The arrays to inspect. - * @returns {Array} Returns an array of combined values. - * @example - * - * _.union([1, 2, 3], [5, 2, 1, 4], [2, 1]); - * // => [1, 2, 3, 5, 4] - */ - function union() { - return baseUniq(baseFlatten(arguments, true, true)); - } - - /** - * Creates a duplicate-value-free version of an array using strict equality - * for comparisons, i.e. `===`. If the array is sorted, providing - * `true` for `isSorted` will use a faster algorithm. If a callback is provided - * each element of `array` is passed through the callback before uniqueness - * is computed. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias unique - * @category Arrays - * @param {Array} array The array to process. - * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a duplicate-value-free array. - * @example - * - * _.uniq([1, 2, 1, 3, 1]); - * // => [1, 2, 3] - * - * _.uniq([1, 1, 2, 2, 3], true); - * // => [1, 2, 3] - * - * _.uniq(['A', 'b', 'C', 'a', 'B', 'c'], function(letter) { return letter.toLowerCase(); }); - * // => ['A', 'b', 'C'] - * - * _.uniq([1, 2.5, 3, 1.5, 2, 3.5], function(num) { return this.floor(num); }, Math); - * // => [1, 2.5, 3] - * - * // using "_.pluck" callback shorthand - * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x'); - * // => [{ 'x': 1 }, { 'x': 2 }] - */ - function uniq(array, isSorted, callback, thisArg) { - // juggle arguments - if (typeof isSorted != 'boolean' && isSorted != null) { - thisArg = callback; - callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted; - isSorted = false; - } - if (callback != null) { - callback = lodash.createCallback(callback, thisArg, 3); - } - return baseUniq(array, isSorted, callback); - } - - /** - * Creates an array excluding all provided values using strict equality for - * comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to filter. - * @param {...*} [value] The values to exclude. - * @returns {Array} Returns a new array of filtered values. - * @example - * - * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1); - * // => [2, 3, 4] - */ - function without(array) { - return baseDifference(array, slice(arguments, 1)); - } - - /** - * Creates an array that is the symmetric difference of the provided arrays. - * See http://en.wikipedia.org/wiki/Symmetric_difference. - * - * @static - * @memberOf _ - * @category Arrays - * @param {...Array} [array] The arrays to inspect. - * @returns {Array} Returns an array of values. - * @example - * - * _.xor([1, 2, 3], [5, 2, 1, 4]); - * // => [3, 5, 4] - * - * _.xor([1, 2, 5], [2, 3, 5], [3, 4, 5]); - * // => [1, 4, 5] - */ - function xor() { - var index = -1, - length = arguments.length; - - while (++index < length) { - var array = arguments[index]; - if (isArray(array) || isArguments(array)) { - var result = result - ? baseUniq(baseDifference(result, array).concat(baseDifference(array, result))) - : array; - } - } - return result || []; - } - - /** - * Creates an array of grouped elements, the first of which contains the first - * elements of the given arrays, the second of which contains the second - * elements of the given arrays, and so on. - * - * @static - * @memberOf _ - * @alias unzip - * @category Arrays - * @param {...Array} [array] Arrays to process. - * @returns {Array} Returns a new array of grouped elements. - * @example - * - * _.zip(['fred', 'barney'], [30, 40], [true, false]); - * // => [['fred', 30, true], ['barney', 40, false]] - */ - function zip() { - var array = arguments.length > 1 ? arguments : arguments[0], - index = -1, - length = array ? max(pluck(array, 'length')) : 0, - result = Array(length < 0 ? 0 : length); - - while (++index < length) { - result[index] = pluck(array, index); - } - return result; - } - - /** - * Creates an object composed from arrays of `keys` and `values`. Provide - * either a single two dimensional array, i.e. `[[key1, value1], [key2, value2]]` - * or two arrays, one of `keys` and one of corresponding `values`. - * - * @static - * @memberOf _ - * @alias object - * @category Arrays - * @param {Array} keys The array of keys. - * @param {Array} [values=[]] The array of values. - * @returns {Object} Returns an object composed of the given keys and - * corresponding values. - * @example - * - * _.zipObject(['fred', 'barney'], [30, 40]); - * // => { 'fred': 30, 'barney': 40 } - */ - function zipObject(keys, values) { - var index = -1, - length = keys ? keys.length : 0, - result = {}; - - if (!values && length && !isArray(keys[0])) { - values = []; - } - while (++index < length) { - var key = keys[index]; - if (values) { - result[key] = values[index]; - } else if (key) { - result[key[0]] = key[1]; - } - } - return result; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Creates a function that executes `func`, with the `this` binding and - * arguments of the created function, only after being called `n` times. - * - * @static - * @memberOf _ - * @category Functions - * @param {number} n The number of times the function must be called before - * `func` is executed. - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. - * @example - * - * var saves = ['profile', 'settings']; - * - * var done = _.after(saves.length, function() { - * console.log('Done saving!'); - * }); - * - * _.forEach(saves, function(type) { - * asyncSave({ 'type': type, 'complete': done }); - * }); - * // => logs 'Done saving!', after all saves have completed - */ - function after(n, func) { - if (!isFunction(func)) { - throw new TypeError; - } - return function() { - if (--n < 1) { - return func.apply(this, arguments); - } - }; - } - - /** - * Creates a function that, when called, invokes `func` with the `this` - * binding of `thisArg` and prepends any additional `bind` arguments to those - * provided to the bound function. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to bind. - * @param {*} [thisArg] The `this` binding of `func`. - * @param {...*} [arg] Arguments to be partially applied. - * @returns {Function} Returns the new bound function. - * @example - * - * var func = function(greeting) { - * return greeting + ' ' + this.name; - * }; - * - * func = _.bind(func, { 'name': 'fred' }, 'hi'); - * func(); - * // => 'hi fred' - */ - function bind(func, thisArg) { - return arguments.length > 2 - ? createWrapper(func, 17, slice(arguments, 2), null, thisArg) - : createWrapper(func, 1, null, null, thisArg); - } - - /** - * Binds methods of an object to the object itself, overwriting the existing - * method. Method names may be specified as individual arguments or as arrays - * of method names. If no method names are provided all the function properties - * of `object` will be bound. - * - * @static - * @memberOf _ - * @category Functions - * @param {Object} object The object to bind and assign the bound methods to. - * @param {...string} [methodName] The object method names to - * bind, specified as individual method names or arrays of method names. - * @returns {Object} Returns `object`. - * @example - * - * var view = { - * 'label': 'docs', - * 'onClick': function() { console.log('clicked ' + this.label); } - * }; - * - * _.bindAll(view); - * jQuery('#docs').on('click', view.onClick); - * // => logs 'clicked docs', when the button is clicked - */ - function bindAll(object) { - var funcs = arguments.length > 1 ? baseFlatten(arguments, true, false, 1) : functions(object), - index = -1, - length = funcs.length; - - while (++index < length) { - var key = funcs[index]; - object[key] = createWrapper(object[key], 1, null, null, object); - } - return object; - } - - /** - * Creates a function that, when called, invokes the method at `object[key]` - * and prepends any additional `bindKey` arguments to those provided to the bound - * function. This method differs from `_.bind` by allowing bound functions to - * reference methods that will be redefined or don't yet exist. - * See http://michaux.ca/articles/lazy-function-definition-pattern. - * - * @static - * @memberOf _ - * @category Functions - * @param {Object} object The object the method belongs to. - * @param {string} key The key of the method. - * @param {...*} [arg] Arguments to be partially applied. - * @returns {Function} Returns the new bound function. - * @example - * - * var object = { - * 'name': 'fred', - * 'greet': function(greeting) { - * return greeting + ' ' + this.name; - * } - * }; - * - * var func = _.bindKey(object, 'greet', 'hi'); - * func(); - * // => 'hi fred' - * - * object.greet = function(greeting) { - * return greeting + 'ya ' + this.name + '!'; - * }; - * - * func(); - * // => 'hiya fred!' - */ - function bindKey(object, key) { - return arguments.length > 2 - ? createWrapper(key, 19, slice(arguments, 2), null, object) - : createWrapper(key, 3, null, null, object); - } - - /** - * Creates a function that is the composition of the provided functions, - * where each function consumes the return value of the function that follows. - * For example, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`. - * Each function is executed with the `this` binding of the composed function. - * - * @static - * @memberOf _ - * @category Functions - * @param {...Function} [func] Functions to compose. - * @returns {Function} Returns the new composed function. - * @example - * - * var realNameMap = { - * 'pebbles': 'penelope' - * }; - * - * var format = function(name) { - * name = realNameMap[name.toLowerCase()] || name; - * return name.charAt(0).toUpperCase() + name.slice(1).toLowerCase(); - * }; - * - * var greet = function(formatted) { - * return 'Hiya ' + formatted + '!'; - * }; - * - * var welcome = _.compose(greet, format); - * welcome('pebbles'); - * // => 'Hiya Penelope!' - */ - function compose() { - var funcs = arguments, - length = funcs.length; - - while (length--) { - if (!isFunction(funcs[length])) { - throw new TypeError; - } - } - return function() { - var args = arguments, - length = funcs.length; - - while (length--) { - args = [funcs[length].apply(this, args)]; - } - return args[0]; - }; - } - - /** - * Creates a function which accepts one or more arguments of `func` that when - * invoked either executes `func` returning its result, if all `func` arguments - * have been provided, or returns a function that accepts one or more of the - * remaining `func` arguments, and so on. The arity of `func` can be specified - * if `func.length` is not sufficient. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to curry. - * @param {number} [arity=func.length] The arity of `func`. - * @returns {Function} Returns the new curried function. - * @example - * - * var curried = _.curry(function(a, b, c) { - * console.log(a + b + c); - * }); - * - * curried(1)(2)(3); - * // => 6 - * - * curried(1, 2)(3); - * // => 6 - * - * curried(1, 2, 3); - * // => 6 - */ - function curry(func, arity) { - arity = typeof arity == 'number' ? arity : (+arity || func.length); - return createWrapper(func, 4, null, null, null, arity); - } - - /** - * Creates a function that will delay the execution of `func` until after - * `wait` milliseconds have elapsed since the last time it was invoked. - * Provide an options object to indicate that `func` should be invoked on - * the leading and/or trailing edge of the `wait` timeout. Subsequent calls - * to the debounced function will return the result of the last `func` call. - * - * Note: If `leading` and `trailing` options are `true` `func` will be called - * on the trailing edge of the timeout only if the the debounced function is - * invoked more than once during the `wait` timeout. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to debounce. - * @param {number} wait The number of milliseconds to delay. - * @param {Object} [options] The options object. - * @param {boolean} [options.leading=false] Specify execution on the leading edge of the timeout. - * @param {number} [options.maxWait] The maximum time `func` is allowed to be delayed before it's called. - * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout. - * @returns {Function} Returns the new debounced function. - * @example - * - * // avoid costly calculations while the window size is in flux - * var lazyLayout = _.debounce(calculateLayout, 150); - * jQuery(window).on('resize', lazyLayout); - * - * // execute `sendMail` when the click event is fired, debouncing subsequent calls - * jQuery('#postbox').on('click', _.debounce(sendMail, 300, { - * 'leading': true, - * 'trailing': false - * }); - * - * // ensure `batchLog` is executed once after 1 second of debounced calls - * var source = new EventSource('/stream'); - * source.addEventListener('message', _.debounce(batchLog, 250, { - * 'maxWait': 1000 - * }, false); - */ - function debounce(func, wait, options) { - var args, - maxTimeoutId, - result, - stamp, - thisArg, - timeoutId, - trailingCall, - lastCalled = 0, - maxWait = false, - trailing = true; - - if (!isFunction(func)) { - throw new TypeError; - } - wait = nativeMax(0, wait) || 0; - if (options === true) { - var leading = true; - trailing = false; - } else if (isObject(options)) { - leading = options.leading; - maxWait = 'maxWait' in options && (nativeMax(wait, options.maxWait) || 0); - trailing = 'trailing' in options ? options.trailing : trailing; - } - var delayed = function() { - var remaining = wait - (now() - stamp); - if (remaining <= 0) { - if (maxTimeoutId) { - clearTimeout(maxTimeoutId); - } - var isCalled = trailingCall; - maxTimeoutId = timeoutId = trailingCall = undefined; - if (isCalled) { - lastCalled = now(); - result = func.apply(thisArg, args); - if (!timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - } - } else { - timeoutId = setTimeout(delayed, remaining); - } - }; - - var maxDelayed = function() { - if (timeoutId) { - clearTimeout(timeoutId); - } - maxTimeoutId = timeoutId = trailingCall = undefined; - if (trailing || (maxWait !== wait)) { - lastCalled = now(); - result = func.apply(thisArg, args); - if (!timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - } - }; - - return function() { - args = arguments; - stamp = now(); - thisArg = this; - trailingCall = trailing && (timeoutId || !leading); - - if (maxWait === false) { - var leadingCall = leading && !timeoutId; - } else { - if (!maxTimeoutId && !leading) { - lastCalled = stamp; - } - var remaining = maxWait - (stamp - lastCalled), - isCalled = remaining <= 0; - - if (isCalled) { - if (maxTimeoutId) { - maxTimeoutId = clearTimeout(maxTimeoutId); - } - lastCalled = stamp; - result = func.apply(thisArg, args); - } - else if (!maxTimeoutId) { - maxTimeoutId = setTimeout(maxDelayed, remaining); - } - } - if (isCalled && timeoutId) { - timeoutId = clearTimeout(timeoutId); - } - else if (!timeoutId && wait !== maxWait) { - timeoutId = setTimeout(delayed, wait); - } - if (leadingCall) { - isCalled = true; - result = func.apply(thisArg, args); - } - if (isCalled && !timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - return result; - }; - } - - /** - * Defers executing the `func` function until the current call stack has cleared. - * Additional arguments will be provided to `func` when it is invoked. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to defer. - * @param {...*} [arg] Arguments to invoke the function with. - * @returns {number} Returns the timer id. - * @example - * - * _.defer(function(text) { console.log(text); }, 'deferred'); - * // logs 'deferred' after one or more milliseconds - */ - function defer(func) { - if (!isFunction(func)) { - throw new TypeError; - } - var args = slice(arguments, 1); - return setTimeout(function() { func.apply(undefined, args); }, 1); - } - - /** - * Executes the `func` function after `wait` milliseconds. Additional arguments - * will be provided to `func` when it is invoked. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to delay. - * @param {number} wait The number of milliseconds to delay execution. - * @param {...*} [arg] Arguments to invoke the function with. - * @returns {number} Returns the timer id. - * @example - * - * _.delay(function(text) { console.log(text); }, 1000, 'later'); - * // => logs 'later' after one second - */ - function delay(func, wait) { - if (!isFunction(func)) { - throw new TypeError; - } - var args = slice(arguments, 2); - return setTimeout(function() { func.apply(undefined, args); }, wait); - } - - /** - * Creates a function that memoizes the result of `func`. If `resolver` is - * provided it will be used to determine the cache key for storing the result - * based on the arguments provided to the memoized function. By default, the - * first argument provided to the memoized function is used as the cache key. - * The `func` is executed with the `this` binding of the memoized function. - * The result cache is exposed as the `cache` property on the memoized function. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to have its output memoized. - * @param {Function} [resolver] A function used to resolve the cache key. - * @returns {Function} Returns the new memoizing function. - * @example - * - * var fibonacci = _.memoize(function(n) { - * return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2); - * }); - * - * fibonacci(9) - * // => 34 - * - * var data = { - * 'fred': { 'name': 'fred', 'age': 40 }, - * 'pebbles': { 'name': 'pebbles', 'age': 1 } - * }; - * - * // modifying the result cache - * var get = _.memoize(function(name) { return data[name]; }, _.identity); - * get('pebbles'); - * // => { 'name': 'pebbles', 'age': 1 } - * - * get.cache.pebbles.name = 'penelope'; - * get('pebbles'); - * // => { 'name': 'penelope', 'age': 1 } - */ - function memoize(func, resolver) { - if (!isFunction(func)) { - throw new TypeError; - } - var memoized = function() { - var cache = memoized.cache, - key = resolver ? resolver.apply(this, arguments) : keyPrefix + arguments[0]; - - return hasOwnProperty.call(cache, key) - ? cache[key] - : (cache[key] = func.apply(this, arguments)); - } - memoized.cache = {}; - return memoized; - } - - /** - * Creates a function that is restricted to execute `func` once. Repeat calls to - * the function will return the value of the first call. The `func` is executed - * with the `this` binding of the created function. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. - * @example - * - * var initialize = _.once(createApplication); - * initialize(); - * initialize(); - * // `initialize` executes `createApplication` once - */ - function once(func) { - var ran, - result; - - if (!isFunction(func)) { - throw new TypeError; - } - return function() { - if (ran) { - return result; - } - ran = true; - result = func.apply(this, arguments); - - // clear the `func` variable so the function may be garbage collected - func = null; - return result; - }; - } - - /** - * Creates a function that, when called, invokes `func` with any additional - * `partial` arguments prepended to those provided to the new function. This - * method is similar to `_.bind` except it does **not** alter the `this` binding. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to partially apply arguments to. - * @param {...*} [arg] Arguments to be partially applied. - * @returns {Function} Returns the new partially applied function. - * @example - * - * var greet = function(greeting, name) { return greeting + ' ' + name; }; - * var hi = _.partial(greet, 'hi'); - * hi('fred'); - * // => 'hi fred' - */ - function partial(func) { - return createWrapper(func, 16, slice(arguments, 1)); - } - - /** - * This method is like `_.partial` except that `partial` arguments are - * appended to those provided to the new function. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to partially apply arguments to. - * @param {...*} [arg] Arguments to be partially applied. - * @returns {Function} Returns the new partially applied function. - * @example - * - * var defaultsDeep = _.partialRight(_.merge, _.defaults); - * - * var options = { - * 'variable': 'data', - * 'imports': { 'jq': $ } - * }; - * - * defaultsDeep(options, _.templateSettings); - * - * options.variable - * // => 'data' - * - * options.imports - * // => { '_': _, 'jq': $ } - */ - function partialRight(func) { - return createWrapper(func, 32, null, slice(arguments, 1)); - } - - /** - * Creates a function that, when executed, will only call the `func` function - * at most once per every `wait` milliseconds. Provide an options object to - * indicate that `func` should be invoked on the leading and/or trailing edge - * of the `wait` timeout. Subsequent calls to the throttled function will - * return the result of the last `func` call. - * - * Note: If `leading` and `trailing` options are `true` `func` will be called - * on the trailing edge of the timeout only if the the throttled function is - * invoked more than once during the `wait` timeout. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to throttle. - * @param {number} wait The number of milliseconds to throttle executions to. - * @param {Object} [options] The options object. - * @param {boolean} [options.leading=true] Specify execution on the leading edge of the timeout. - * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout. - * @returns {Function} Returns the new throttled function. - * @example - * - * // avoid excessively updating the position while scrolling - * var throttled = _.throttle(updatePosition, 100); - * jQuery(window).on('scroll', throttled); - * - * // execute `renewToken` when the click event is fired, but not more than once every 5 minutes - * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, { - * 'trailing': false - * })); - */ - function throttle(func, wait, options) { - var leading = true, - trailing = true; - - if (!isFunction(func)) { - throw new TypeError; - } - if (options === false) { - leading = false; - } else if (isObject(options)) { - leading = 'leading' in options ? options.leading : leading; - trailing = 'trailing' in options ? options.trailing : trailing; - } - debounceOptions.leading = leading; - debounceOptions.maxWait = wait; - debounceOptions.trailing = trailing; - - return debounce(func, wait, debounceOptions); - } - - /** - * Creates a function that provides `value` to the wrapper function as its - * first argument. Additional arguments provided to the function are appended - * to those provided to the wrapper function. The wrapper is executed with - * the `this` binding of the created function. - * - * @static - * @memberOf _ - * @category Functions - * @param {*} value The value to wrap. - * @param {Function} wrapper The wrapper function. - * @returns {Function} Returns the new function. - * @example - * - * var p = _.wrap(_.escape, function(func, text) { - * return '

' + func(text) + '

'; - * }); - * - * p('Fred, Wilma, & Pebbles'); - * // => '

Fred, Wilma, & Pebbles

' - */ - function wrap(value, wrapper) { - return createWrapper(wrapper, 16, [value]); - } - - /*--------------------------------------------------------------------------*/ - - /** - * Creates a function that returns `value`. - * - * @static - * @memberOf _ - * @category Utilities - * @param {*} value The value to return from the new function. - * @returns {Function} Returns the new function. - * @example - * - * var object = { 'name': 'fred' }; - * var getter = _.constant(object); - * getter() === object; - * // => true - */ - function constant(value) { - return function() { - return value; - }; - } - - /** - * Produces a callback bound to an optional `thisArg`. If `func` is a property - * name the created callback will return the property value for a given element. - * If `func` is an object the created callback will return `true` for elements - * that contain the equivalent object properties, otherwise it will return `false`. - * - * @static - * @memberOf _ - * @category Utilities - * @param {*} [func=identity] The value to convert to a callback. - * @param {*} [thisArg] The `this` binding of the created callback. - * @param {number} [argCount] The number of arguments the callback accepts. - * @returns {Function} Returns a callback function. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * // wrap to create custom callback shorthands - * _.createCallback = _.wrap(_.createCallback, function(func, callback, thisArg) { - * var match = /^(.+?)__([gl]t)(.+)$/.exec(callback); - * return !match ? func(callback, thisArg) : function(object) { - * return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3]; - * }; - * }); - * - * _.filter(characters, 'age__gt38'); - * // => [{ 'name': 'fred', 'age': 40 }] - */ - function createCallback(func, thisArg, argCount) { - var type = typeof func; - if (func == null || type == 'function') { - return baseCreateCallback(func, thisArg, argCount); - } - // handle "_.pluck" style callback shorthands - if (type != 'object') { - return property(func); - } - var props = keys(func), - key = props[0], - a = func[key]; - - // handle "_.where" style callback shorthands - if (props.length == 1 && a === a && !isObject(a)) { - // fast path the common case of providing an object with a single - // property containing a primitive value - return function(object) { - var b = object[key]; - return a === b && (a !== 0 || (1 / a == 1 / b)); - }; - } - return function(object) { - var length = props.length, - result = false; - - while (length--) { - if (!(result = baseIsEqual(object[props[length]], func[props[length]], null, true))) { - break; - } - } - return result; - }; - } - - /** - * Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their - * corresponding HTML entities. - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} string The string to escape. - * @returns {string} Returns the escaped string. - * @example - * - * _.escape('Fred, Wilma, & Pebbles'); - * // => 'Fred, Wilma, & Pebbles' - */ - function escape(string) { - return string == null ? '' : String(string).replace(reUnescapedHtml, escapeHtmlChar); - } - - /** - * This method returns the first argument provided to it. - * - * @static - * @memberOf _ - * @category Utilities - * @param {*} value Any value. - * @returns {*} Returns `value`. - * @example - * - * var object = { 'name': 'fred' }; - * _.identity(object) === object; - * // => true - */ - function identity(value) { - return value; - } - - /** - * Adds function properties of a source object to the destination object. - * If `object` is a function methods will be added to its prototype as well. - * - * @static - * @memberOf _ - * @category Utilities - * @param {Function|Object} [object=lodash] object The destination object. - * @param {Object} source The object of functions to add. - * @param {Object} [options] The options object. - * @param {boolean} [options.chain=true] Specify whether the functions added are chainable. - * @example - * - * function capitalize(string) { - * return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase(); - * } - * - * _.mixin({ 'capitalize': capitalize }); - * _.capitalize('fred'); - * // => 'Fred' - * - * _('fred').capitalize().value(); - * // => 'Fred' - * - * _.mixin({ 'capitalize': capitalize }, { 'chain': false }); - * _('fred').capitalize(); - * // => 'Fred' - */ - function mixin(object, source, options) { - var chain = true, - methodNames = source && functions(source); - - if (!source || (!options && !methodNames.length)) { - if (options == null) { - options = source; - } - ctor = lodashWrapper; - source = object; - object = lodash; - methodNames = functions(source); - } - if (options === false) { - chain = false; - } else if (isObject(options) && 'chain' in options) { - chain = options.chain; - } - var ctor = object, - isFunc = isFunction(ctor); - - forEach(methodNames, function(methodName) { - var func = object[methodName] = source[methodName]; - if (isFunc) { - ctor.prototype[methodName] = function() { - var chainAll = this.__chain__, - value = this.__wrapped__, - args = [value]; - - push.apply(args, arguments); - var result = func.apply(object, args); - if (chain || chainAll) { - if (value === result && isObject(result)) { - return this; - } - result = new ctor(result); - result.__chain__ = chainAll; - } - return result; - }; - } - }); - } - - /** - * Reverts the '_' variable to its previous value and returns a reference to - * the `lodash` function. - * - * @static - * @memberOf _ - * @category Utilities - * @returns {Function} Returns the `lodash` function. - * @example - * - * var lodash = _.noConflict(); - */ - function noConflict() { - context._ = oldDash; - return this; - } - - /** - * A no-operation function. - * - * @static - * @memberOf _ - * @category Utilities - * @example - * - * var object = { 'name': 'fred' }; - * _.noop(object) === undefined; - * // => true - */ - function noop() { - // no operation performed - } - - /** - * Gets the number of milliseconds that have elapsed since the Unix epoch - * (1 January 1970 00:00:00 UTC). - * - * @static - * @memberOf _ - * @category Utilities - * @example - * - * var stamp = _.now(); - * _.defer(function() { console.log(_.now() - stamp); }); - * // => logs the number of milliseconds it took for the deferred function to be called - */ - var now = isNative(now = Date.now) && now || function() { - return new Date().getTime(); - }; - - /** - * Converts the given value into an integer of the specified radix. - * If `radix` is `undefined` or `0` a `radix` of `10` is used unless the - * `value` is a hexadecimal, in which case a `radix` of `16` is used. - * - * Note: This method avoids differences in native ES3 and ES5 `parseInt` - * implementations. See http://es5.github.io/#E. - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} value The value to parse. - * @param {number} [radix] The radix used to interpret the value to parse. - * @returns {number} Returns the new integer value. - * @example - * - * _.parseInt('08'); - * // => 8 - */ - var parseInt = nativeParseInt(whitespace + '08') == 8 ? nativeParseInt : function(value, radix) { - // Firefox < 21 and Opera < 15 follow the ES3 specified implementation of `parseInt` - return nativeParseInt(isString(value) ? value.replace(reLeadingSpacesAndZeros, '') : value, radix || 0); - }; - - /** - * Creates a "_.pluck" style function, which returns the `key` value of a - * given object. - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} key The name of the property to retrieve. - * @returns {Function} Returns the new function. - * @example - * - * var characters = [ - * { 'name': 'fred', 'age': 40 }, - * { 'name': 'barney', 'age': 36 } - * ]; - * - * var getName = _.property('name'); - * - * _.map(characters, getName); - * // => ['barney', 'fred'] - * - * _.sortBy(characters, getName); - * // => [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] - */ - function property(key) { - return function(object) { - return object[key]; - }; - } - - /** - * Produces a random number between `min` and `max` (inclusive). If only one - * argument is provided a number between `0` and the given number will be - * returned. If `floating` is truey or either `min` or `max` are floats a - * floating-point number will be returned instead of an integer. - * - * @static - * @memberOf _ - * @category Utilities - * @param {number} [min=0] The minimum possible value. - * @param {number} [max=1] The maximum possible value. - * @param {boolean} [floating=false] Specify returning a floating-point number. - * @returns {number} Returns a random number. - * @example - * - * _.random(0, 5); - * // => an integer between 0 and 5 - * - * _.random(5); - * // => also an integer between 0 and 5 - * - * _.random(5, true); - * // => a floating-point number between 0 and 5 - * - * _.random(1.2, 5.2); - * // => a floating-point number between 1.2 and 5.2 - */ - function random(min, max, floating) { - var noMin = min == null, - noMax = max == null; - - if (floating == null) { - if (typeof min == 'boolean' && noMax) { - floating = min; - min = 1; - } - else if (!noMax && typeof max == 'boolean') { - floating = max; - noMax = true; - } - } - if (noMin && noMax) { - max = 1; - } - min = +min || 0; - if (noMax) { - max = min; - min = 0; - } else { - max = +max || 0; - } - if (floating || min % 1 || max % 1) { - var rand = nativeRandom(); - return nativeMin(min + (rand * (max - min + parseFloat('1e-' + ((rand +'').length - 1)))), max); - } - return baseRandom(min, max); - } - - /** - * Resolves the value of property `key` on `object`. If `key` is a function - * it will be invoked with the `this` binding of `object` and its result returned, - * else the property value is returned. If `object` is falsey then `undefined` - * is returned. - * - * @static - * @memberOf _ - * @category Utilities - * @param {Object} object The object to inspect. - * @param {string} key The name of the property to resolve. - * @returns {*} Returns the resolved value. - * @example - * - * var object = { - * 'cheese': 'crumpets', - * 'stuff': function() { - * return 'nonsense'; - * } - * }; - * - * _.result(object, 'cheese'); - * // => 'crumpets' - * - * _.result(object, 'stuff'); - * // => 'nonsense' - */ - function result(object, key) { - if (object) { - var value = object[key]; - return isFunction(value) ? object[key]() : value; - } - } - - /** - * A micro-templating method that handles arbitrary delimiters, preserves - * whitespace, and correctly escapes quotes within interpolated code. - * - * Note: In the development build, `_.template` utilizes sourceURLs for easier - * debugging. See http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl - * - * For more information on precompiling templates see: - * http://lodash.com/custom-builds - * - * For more information on Chrome extension sandboxes see: - * http://developer.chrome.com/stable/extensions/sandboxingEval.html - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} text The template text. - * @param {Object} data The data object used to populate the text. - * @param {Object} [options] The options object. - * @param {RegExp} [options.escape] The "escape" delimiter. - * @param {RegExp} [options.evaluate] The "evaluate" delimiter. - * @param {Object} [options.imports] An object to import into the template as local variables. - * @param {RegExp} [options.interpolate] The "interpolate" delimiter. - * @param {string} [sourceURL] The sourceURL of the template's compiled source. - * @param {string} [variable] The data object variable name. - * @returns {Function|string} Returns a compiled function when no `data` object - * is given, else it returns the interpolated text. - * @example - * - * // using the "interpolate" delimiter to create a compiled template - * var compiled = _.template('hello <%= name %>'); - * compiled({ 'name': 'fred' }); - * // => 'hello fred' - * - * // using the "escape" delimiter to escape HTML in data property values - * _.template('<%- value %>', { 'value': '