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.isArray) {
|
Array.isArray = function(arg) {
|
return Object.prototype.toString.call(arg) === '[object Array]';
|
};
|
}
|
|
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;
|
};
|
}
|
