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- // From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
- if (!Object.keys) {
- Object.keys = (function () {
- var hasOwnProperty = Object.prototype.hasOwnProperty,
- hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'),
- dontEnums = [
- 'toString',
- 'toLocaleString',
- 'valueOf',
- 'hasOwnProperty',
- 'isPrototypeOf',
- 'propertyIsEnumerable',
- 'constructor'
- ],
- dontEnumsLength = dontEnums.length;
- return function (obj) {
- if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) throw new TypeError('Object.keys called on non-object');
- var result = [];
- for (var prop in obj) {
- if (hasOwnProperty.call(obj, prop)) result.push(prop);
- }
- if (hasDontEnumBug) {
- for (var i=0; i < dontEnumsLength; i++) {
- if (hasOwnProperty.call(obj, dontEnums[i])) result.push(dontEnums[i]);
- }
- }
- return result;
- };
- })();
- }
- // From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter
- if (!Array.prototype.filter)
- {
- Array.prototype.filter = function(fun /*, thisp */)
- {
- "use strict";
- if (this == null)
- throw new TypeError();
- var t = Object(this);
- var len = t.length >>> 0;
- if (typeof fun != "function")
- throw new TypeError();
- var res = [];
- var thisp = arguments[1];
- for (var i = 0; i < len; i++)
- {
- if (i in t)
- {
- var val = t[i]; // in case fun mutates this
- if (fun.call(thisp, val, i, t))
- res.push(val);
- }
- }
- return res;
- };
- }
- // From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/Trim
- if (!String.prototype.trim) {
- String.prototype.trim = function () {
- return this.replace(/^\s+|\s+$/g, '');
- };
- }
- // From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
- if (!Array.prototype.forEach)
- {
- Array.prototype.forEach = function(fun /*, thisArg */)
- {
- "use strict";
- if (this === void 0 || this === null)
- throw new TypeError();
- var t = Object(this);
- var len = t.length >>> 0;
- if (typeof fun !== "function")
- throw new TypeError();
- var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
- for (var i = 0; i < len; i++)
- {
- if (i in t)
- fun.call(thisArg, t[i], i, t);
- }
- };
- }
- // Production steps of ECMA-262, Edition 5, 15.4.4.19
- // Reference: http://es5.github.com/#x15.4.4.19
- if (!Array.prototype.map) {
- Array.prototype.map = function(callback, thisArg) {
- var T, A, k;
- if (this == null) {
- throw new TypeError(" this is null or not defined");
- }
- // 1. Let O be the result of calling ToObject passing the |this| value as the argument.
- var O = Object(this);
- // 2. Let lenValue be the result of calling the Get internal method of O with the argument "length".
- // 3. Let len be ToUint32(lenValue).
- var len = O.length >>> 0;
- // 4. If IsCallable(callback) is false, throw a TypeError exception.
- // See: http://es5.github.com/#x9.11
- if (typeof callback !== "function") {
- throw new TypeError(callback + " is not a function");
- }
- // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
- if (thisArg) {
- T = thisArg;
- }
- // 6. Let A be a new array created as if by the expression new Array(len) where Array is
- // the standard built-in constructor with that name and len is the value of len.
- A = new Array(len);
- // 7. Let k be 0
- k = 0;
- // 8. Repeat, while k < len
- while(k < len) {
- var kValue, mappedValue;
- // a. Let Pk be ToString(k).
- // This is implicit for LHS operands of the in operator
- // b. Let kPresent be the result of calling the HasProperty internal method of O with argument Pk.
- // This step can be combined with c
- // c. If kPresent is true, then
- if (k in O) {
- // i. Let kValue be the result of calling the Get internal method of O with argument Pk.
- kValue = O[ k ];
- // ii. Let mappedValue be the result of calling the Call internal method of callback
- // with T as the this value and argument list containing kValue, k, and O.
- mappedValue = callback.call(T, kValue, k, O);
- // iii. Call the DefineOwnProperty internal method of A with arguments
- // Pk, Property Descriptor {Value: mappedValue, : true, Enumerable: true, Configurable: true},
- // and false.
- // In browsers that support Object.defineProperty, use the following:
- // Object.defineProperty(A, Pk, { value: mappedValue, writable: true, enumerable: true, configurable: true });
- // For best browser support, use the following:
- A[ k ] = mappedValue;
- }
- // d. Increase k by 1.
- k++;
- }
- // 9. return A
- return A;
- };
- }
- // From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf
- if (!Array.prototype.indexOf) {
- Array.prototype.indexOf = function (searchElement, fromIndex) {
- if ( this === undefined || this === null ) {
- throw new TypeError( '"this" is null or not defined' );
- }
- var length = this.length >>> 0; // Hack to convert object.length to a UInt32
- fromIndex = +fromIndex || 0;
- if (Math.abs(fromIndex) === Infinity) {
- fromIndex = 0;
- }
- if (fromIndex < 0) {
- fromIndex += length;
- if (fromIndex < 0) {
- fromIndex = 0;
- }
- }
- for (;fromIndex < length; fromIndex++) {
- if (this[fromIndex] === searchElement) {
- return fromIndex;
- }
- }
- return -1;
- };
- }
- // Based on https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray
- if (! Array.isArray) {
- Array.isArray = function(obj) {
- return Object.prototype.toString.call(obj) === "[object Array]";
- };
- }
- // https://github.com/ttaubert/node-arraybuffer-slice
- // (c) 2013 Tim Taubert <tim@timtaubert.de>
- // arraybuffer-slice may be freely distributed under the MIT license.
- "use strict";
- if (typeof ArrayBuffer !== 'undefined' && !ArrayBuffer.prototype.slice) {
- ArrayBuffer.prototype.slice = function (begin, end) {
- begin = (begin|0) || 0;
- var num = this.byteLength;
- end = end === (void 0) ? num : (end|0);
- // Handle negative values.
- if (begin < 0) begin += num;
- if (end < 0) end += num;
- if (num === 0 || begin >= num || begin >= end) {
- return new ArrayBuffer(0);
- }
- var length = Math.min(num - begin, end - begin);
- var target = new ArrayBuffer(length);
- var targetArray = new Uint8Array(target);
- targetArray.set(new Uint8Array(this, begin, length));
- return target;
- };
- }
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