A collection of JavaScript Number prototype updates.

number.coffee

# Info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty
# Info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number
# Source: https://gist.github.com/jgphilpott/6332dc7f5636db9ba455e1575407c496

# Credit: https://stackoverflow.com/a/7312534/1544937
Object.defineProperty Number.prototype, "round",

    value: (decimals = 0) ->

        parseFloat this.toFixed decimals

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "zero",

    value: ->

        not Math.abs this

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "positive",

    value: ->

        this > 0

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "negative",

    value: ->

        this < 0

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "integer",

    value: ->

        this % 1 is 0

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "float",

    value: ->

        this % 1 isnt 0

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "even",

    value: ->

        if this % 1 isnt 0

            return null

        else

            return (this & 1) is 0

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "odd",

    value: ->

        if this % 1 isnt 0

            return null

        else

            return (this & 1) isnt 0

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "abs",

    value: ->

        Math.abs this

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "boolean",

    value: ->

        Boolean Math.abs this

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "number",

    value: ->

        Number this

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "string",

    value: ->

        String this

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "array",

    value: ->

        Array this

    configurable: false,
    enumerable: false,
    writable: false

Object.defineProperty Number.prototype, "object",

    value: ->

        Object this

    configurable: false,
    enumerable: false,
    writable: false

number.js

// Info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty
// Info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number
// Source: https://gist.github.com/jgphilpott/6332dc7f5636db9ba455e1575407c496

// Credit: https://stackoverflow.com/a/7312534/1544937
Object.defineProperty(Number.prototype, "round", {
  value: function(decimals = 0) {
    return parseFloat(this.toFixed(decimals));
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "zero", {
  value: function() {
    return !Math.abs(this);
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "positive", {
  value: function() {
    return this > 0;
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "negative", {
  value: function() {
    return this < 0;
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "integer", {
  value: function() {
    return this % 1 === 0;
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "float", {
  value: function() {
    return this % 1 !== 0;
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "even", {
  value: function() {
    if (this % 1 !== 0) {
      return null;
    } else {
      return (this & 1) === 0;
    }
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "odd", {
  value: function() {
    if (this % 1 !== 0) {
      return null;
    } else {
      return (this & 1) !== 0;
    }
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "abs", {
  value: function() {
    return Math.abs(this);
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "boolean", {
  value: function() {
    return Boolean(Math.abs(this));
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "number", {
  value: function() {
    return Number(this);
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "string", {
  value: function() {
    return String(this);
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "array", {
  value: function() {
    return Array(this);
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Object.defineProperty(Number.prototype, "object", {
  value: function() {
    return Object(this);
  },
  configurable: false,
  enumerable: false,
  writable: false
});

Prototyping

This gist is part of a collection of gists that extend JavaScript data prototypes such as Boolean, Number, String, Array and Object. See below for links to all the gists:

• Boolean
• Number
• String
• Array
• Object