101 lines
2.7 KiB
JavaScript
101 lines
2.7 KiB
JavaScript
// From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
|
|
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;
|
|
};
|
|
}());
|
|
}
|
|
|
|
//Production steps of ECMA-262, Edition 5, 15.4.4.18
|
|
//Reference: http://es5.github.com/#x15.4.4.18
|
|
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
|
|
};
|
|
}
|