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- // https://developer.mozilla.org/en/JavaScript/Reference/global_objects/array/foreach
- if (!Array.prototype.forEach)
- {
- Array.prototype.forEach = function(fun /*, thisp */)
- {
- "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 thisp = arguments[1];
- for (var i = 0; i < len; i++)
- {
- if (i in t)
- fun.call(thisp, t[i], i, t);
- }
- };
- }
- // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/map
- // 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 ({}.toString.call(callback) != "[object 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, Writable: 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;
- };
- }
- // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/Reduce
- if (!Array.prototype.reduce)
- {
- Array.prototype.reduce = function(fun /*, initialValue */)
- {
- "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();
- // no value to return if no initial value and an empty array
- if (len == 0 && arguments.length == 1)
- throw new TypeError();
- var k = 0;
- var accumulator;
- if (arguments.length >= 2)
- {
- accumulator = arguments[1];
- }
- else
- {
- do
- {
- if (k in t)
- {
- accumulator = t[k++];
- break;
- }
- // if array contains no values, no initial value to return
- if (++k >= len)
- throw new TypeError();
- }
- while (true);
- }
- while (k < len)
- {
- if (k in t)
- accumulator = fun.call(undefined, accumulator, t[k], k, t);
- k++;
- }
- return accumulator;
- };
- }
- // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf
- if (!Array.prototype.indexOf) {
- Array.prototype.indexOf = function (searchElement /*, fromIndex */ ) {
- "use strict";
- if (this === void 0 || this === null) {
- throw new TypeError();
- }
- var t = Object(this);
- var len = t.length >>> 0;
- if (len === 0) {
- return -1;
- }
- var n = 0;
- if (arguments.length > 0) {
- n = Number(arguments[1]);
- if (n !== n) { // shortcut for verifying if it's NaN
- n = 0;
- } else if (n !== 0 && n !== Infinity && n !== -Infinity) {
- n = (n > 0 || -1) * Math.floor(Math.abs(n));
- }
- }
- if (n >= len) {
- return -1;
- }
- var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0);
- for (; k < len; k++) {
- if (k in t && t[k] === searchElement) {
- return k;
- }
- }
- return -1;
- }
- }
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