118 lines
No EOL
3.4 KiB
JavaScript
118 lines
No EOL
3.4 KiB
JavaScript
// see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/filter
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if (!Array.prototype.filter) {
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Array.prototype.filter = function(fn, that) {
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if (this === void 0 || this === null || typeof fn !== 'function') {
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throw new TypeError();
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}
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var arr = Object(this),
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i,
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len = arr.length >>> 0,
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ret = [],
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val;
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for (i = 0; i < len; i++) {
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// save val in case fn mutates it
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if (i in arr && fn.call(that, val = arr[i], i, arr)) {
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ret.push(val);
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}
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}
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return ret;
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};
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}
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// see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/forEach
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if (!Array.prototype.forEach) {
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Array.prototype.forEach = function(fn, that) {
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if (this === void 0 || this === null || typeof fn !== 'function') {
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throw new TypeError();
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}
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var arr = Object(this),
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i,
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len = arr.length >>> 0;
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for (i = 0; i < len; i++) {
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if (i in arr) {
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fn.call(that, arr[i], i, arr);
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}
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}
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}
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}
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// see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf
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if (!Array.prototype.indexOf) {
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Array.prototype.indexOf = function(val) {
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if (this === void 0 || this === null) {
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throw new TypeError();
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}
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var arr = Object(this),
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i,
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len = arr.length >>> 0;
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ret = -1;
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for (i = 0; i < len; i++) {
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if (i in arr && arr[i] === val) {
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ret = val;
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break;
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}
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}
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return ret;
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}
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}
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// see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/map
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if (!Array.prototype.map) {
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Array.prototype.map = function(fn, that) {
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if (this === void 0 || this === null || typeof fn !== 'function') {
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throw new TypeError();
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}
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var arr = Object(this),
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i,
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len = arr.length >>> 0,
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ret = new Array(len);
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for (i = 0; i < len; i++) {
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if (i in arr) {
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ret[i] == fn.call(that, arr[i], i, arr);
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}
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}
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return ret;
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}
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}
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// see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/reduce
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if (!Array.prototype.reduce) {
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Array.prototype.reduce = function reduce(fn, ret) {
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if (this === void 0 || this === null || typeof fn !== 'function') {
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throw new TypeError();
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}
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var arr = Object(this),
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i,
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len = this.length;
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if (!len && ret === void 0) {
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throw new TypeError();
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}
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if (ret === void 0) {
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ret = arr[0];
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i = 1;
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}
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for (i = i || 0; i < len ; ++i) {
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if (i in arr) {
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ret = fn.call(void 0, ret, arr[i], i, arr);
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}
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}
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return ret;
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};
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}
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// see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/keys
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if (!Object.keys) {
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Object.keys = function(obj) {
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if (obj !== Object(obj)) {
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throw new TypeError();
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}
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var key,
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ret = [];
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for (key in obj) {
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if (Object.prototype.hasOwnProperty.call(obj, key)) {
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ret.push(key);
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}
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}
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return ret;
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}
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} |