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- (function () {
- // Object.keys
- (function () {
- if (!Object.keys) {
- Object.keys = (function () {
- 'use strict';
- 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 = [], prop, i;
- for (prop in obj) {
- if (hasOwnProperty.call(obj, prop)) {
- result.push(prop);
- }
- }
- if (hasDontEnumBug) {
- for (i = 0; i < dontEnumsLength; i++) {
- if (hasOwnProperty.call(obj, dontEnums[i])) {
- result.push(dontEnums[i]);
- }
- }
- }
- return result;
- };
- }());
- }
- })();
- 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 (arguments.length > 1) {
- 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, k, {
- // 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;
- };
- }
- if (!Array.prototype.forEach) {
- Array.prototype.forEach = function (callback, thisArg) {
- var T, 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 (arguments.length > 1) {
- T = thisArg;
- }
- // 6. Let k be 0
- k = 0;
- // 7. Repeat, while k < len
- while (k < len) {
- var kValue;
- // 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. Call the Call internal method of callback with T as the this value and
- // argument list containing kValue, k, and O.
- callback.call(T, kValue, k, O);
- }
- // d. Increase k by 1.
- k++;
- }
- // 8. return undefined
- };
- }
- if (!Array.prototype.indexOf) {
- Array.prototype.indexOf = function(searchElement, fromIndex) {
- var k;
- // 1. Let O be the result of calling ToObject passing
- // the this value as the argument.
- if (this == null) {
- throw new TypeError('"this" is null or not defined');
- }
- 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 len is 0, return -1.
- if (len === 0) {
- return -1;
- }
- // 5. If argument fromIndex was passed let n be
- // ToInteger(fromIndex); else let n be 0.
- var n = +fromIndex || 0;
- if (Math.abs(n) === Infinity) {
- n = 0;
- }
- // 6. If n >= len, return -1.
- if (n >= len) {
- return -1;
- }
- // 7. If n >= 0, then Let k be n.
- // 8. Else, n<0, Let k be len - abs(n).
- // If k is less than 0, then let k be 0.
- k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);
- // 9. Repeat, while k < len
- while (k < len) {
- var kValue;
- // 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
- // i. Let elementK be the result of calling the Get
- // internal method of O with the argument ToString(k).
- // ii. Let same be the result of applying the
- // Strict Equality Comparison Algorithm to
- // searchElement and elementK.
- // iii. If same is true, return k.
- if (k in O && O[k] === searchElement) {
- return k;
- }
- k++;
- }
- return -1;
- };
- }
- })();
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