38 lines
1.5 KiB
JavaScript
38 lines
1.5 KiB
JavaScript
|
'use strict';
|
||
|
|
var bind = require('../internals/function-bind-context');
|
||
|
|
var uncurryThis = require('../internals/function-uncurry-this');
|
||
|
|
var IndexedObject = require('../internals/indexed-object');
|
||
|
|
var toObject = require('../internals/to-object');
|
||
|
|
var toPropertyKey = require('../internals/to-property-key');
|
||
|
|
var lengthOfArrayLike = require('../internals/length-of-array-like');
|
||
|
|
var objectCreate = require('../internals/object-create');
|
||
|
|
var arrayFromConstructorAndList = require('../internals/array-from-constructor-and-list');
|
||
|
|
|
||
|
|
var $Array = Array;
|
||
|
|
var push = uncurryThis([].push);
|
||
|
|
|
||
|
|
module.exports = function ($this, callbackfn, that, specificConstructor) {
|
||
|
|
var O = toObject($this);
|
||
|
|
var self = IndexedObject(O);
|
||
|
|
var boundFunction = bind(callbackfn, that);
|
||
|
|
var target = objectCreate(null);
|
||
|
|
var length = lengthOfArrayLike(self);
|
||
|
|
var index = 0;
|
||
|
|
var Constructor, key, value;
|
||
|
|
for (;length > index; index++) {
|
||
|
|
value = self[index];
|
||
|
|
key = toPropertyKey(boundFunction(value, index, O));
|
||
|
|
// in some IE versions, `hasOwnProperty` returns incorrect result on integer keys
|
||
|
|
// but since it's a `null` prototype object, we can safely use `in`
|
||
|
|
if (key in target) push(target[key], value);
|
||
|
|
else target[key] = [value];
|
||
|
|
}
|
||
|
|
// TODO: Remove this block from `core-js@4`
|
||
|
|
if (specificConstructor) {
|
||
|
|
Constructor = specificConstructor(O);
|
||
|
|
if (Constructor !== $Array) {
|
||
|
|
for (key in target) target[key] = arrayFromConstructorAndList(Constructor, target[key]);
|
||
|
|
}
|
||
|
|
} return target;
|
||
|
|
};
|