isA.js

Deprecated (use ne-types.git instead)

Installation

To install the isA library, invoke

npm install isa-lib

About

Reusable node.js/browser JavaScript library that exposes some isXXX() type of functions. These functions do as much as possible to provide cross JavaScript VM compatible methods to determine whether or not an object is of a given type.

If this library is included in a browser via a script tag, all of it's components will be placed in the window scope.

Example Usage:

```html <script type="text/javascript" src="/path/to/isA.js"></script> <script type="text/javascript"> console.log(isA(IS_A.NUMBER, 5)); // true console.log(isNumber(5)); // true console.log(isA(5, 5)); // true console.log(isA(5)); // "[object Number]" console.log(IS_A.NUMBER); // "[object Number]" console.log('NUMBER', 5); // true console.log(isA("[object Number]", 5)); // true console.log(isA(Number, 5)); // true console.log(isA(String, "Hi")); // true </script> ```

If this library is require()'ed in node.js, it will return a function that takes either 0 or 1 parameters. If no parameters are required, the functions and properties of this library are returned in a single object literal that can be used for assignment normally. If the function is invoked with a parameter, that parameter is assumed to be the scope into which these functions and properties will be copied.

Example usage:

```javascript var isA = require('isa-lib')(); // scoped to isA param var isA = require('isa-lib')(global); // scoped to isA *AND* global ```

Library contents

Function isA(type, object);
Function isUndefined(object);
Function isFunction(object);
Function isBoolean(object);
Function isObject(object);
Function isRegExp(object);
Function isString(object);
Function isNumber(object);
Function isArray(object);
Function isError(object);
Function isNull(object);

// Function to inject this library to a JavaScript scope object
Function INJECT_IS_A_LIB(scopeObject);

// Anything less than 1 indicates pairs of incorrect type designations
Number   IS_A_ACCURACY

// Array of pairs of types that incorrectly return the same value
Array    IS_A_QUESTIONABLE

// Constants of known base types
Object   IS_A

// Back reference to type string from constructor
Array    IS_A_BACKREF