add-array-methods

Add custom array methods that can chainable, like subclass Array, but not modify Array.prototype, works in ES3+

Install

• NPM

npm install -S add-array-methods

Usage

var myArr = []
addArrayMethods({
  last: function() {
    return this[this.length-1]
  },
  // ... more here
})(myArr)

myArr.sort().last()

The result is, the last methods will always available, even after all native methods that returns array, like below:

assert.equal(Array.prototype.last, undefined)

myArr.filter(v=>v > 2).sort().last()

API

addArrayMethods(yourMethods, options) -> (arr) -> arr

options.es3 = true|false

default: false

When set to true, using direct methods assign instead of Object.defineProperty

options.natives = string[]

default: [ 'filter', 'slice', 'concat', 'reverse', 'sort', 'splice', 'map', 'fill', 'copyWithin' ]

This default value holds in addArrayMethods.natives

Native methods will copy from Array.prototype, to arr, when create new array wrapper

yourMethods = object

default: undefined

The object format is:

{
  method1: func1,
  method2: func2,
  ...
}

yourMethods can overwrite native functions with same method name

addArrayMethods.natives

This property hold the default natives array values, change it will affect all upcoming instance of addArrayMethods