76 lines
2.2 KiB
JavaScript
76 lines
2.2 KiB
JavaScript
/************** ARRAY ********************/
|
|
|
|
if (!Array.prototype.find) {
|
|
Object.defineProperty(Array.prototype, 'find', {
|
|
value: function(predicate) {
|
|
// 1. Let O be ? ToObject(this value).
|
|
if (this == null) {
|
|
throw new TypeError('"this" is null or not defined');
|
|
}
|
|
|
|
var o = Object(this);
|
|
|
|
// 2. Let len be ? ToLength(? Get(O, "length")).
|
|
var len = o.length >>> 0;
|
|
|
|
// 3. If IsCallable(predicate) is false, throw a TypeError exception.
|
|
if (typeof predicate !== 'function') {
|
|
throw new TypeError('predicate must be a function');
|
|
}
|
|
|
|
// 4. If thisArg was supplied, let T be thisArg; else let T be undefined.
|
|
var thisArg = arguments[1];
|
|
|
|
// 5. Let k be 0.
|
|
var k = 0;
|
|
|
|
// 6. Repeat, while k < len
|
|
while (k < len) {
|
|
// a. Let Pk be ! ToString(k).
|
|
// b. Let kValue be ? Get(O, Pk).
|
|
// c. Let testResult be ToBoolean(? Call(predicate, T, ( kValue, k, O ))).
|
|
// d. If testResult is true, return kValue.
|
|
var kValue = o[k];
|
|
if (predicate.call(thisArg, kValue, k, o)) {
|
|
return kValue;
|
|
}
|
|
// e. Increase k by 1.
|
|
k++;
|
|
}
|
|
|
|
// 7. Return undefined.
|
|
return undefined;
|
|
}
|
|
});
|
|
}
|
|
|
|
if (typeof Object.assign != 'function') {
|
|
// Must be writable: true, enumerable: false, configurable: true
|
|
Object.defineProperty(Object, "assign", {
|
|
value: function assign(target, varArgs) { // .length of function is 2
|
|
'use strict';
|
|
if (target == null) { // TypeError if undefined or null
|
|
throw new TypeError('Cannot convert undefined or null to object');
|
|
}
|
|
|
|
var to = Object(target);
|
|
|
|
for (var index = 1; index < arguments.length; index++) {
|
|
var nextSource = arguments[index];
|
|
|
|
if (nextSource != null) { // Skip over if undefined or null
|
|
for (var nextKey in nextSource) {
|
|
// Avoid bugs when hasOwnProperty is shadowed
|
|
if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
|
|
to[nextKey] = nextSource[nextKey];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return to;
|
|
},
|
|
writable: true,
|
|
configurable: true
|
|
});
|
|
}
|