blob: d6b44b5dcf8350faf03f2e30dd360e3bd0c24513 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
'use strict';
var GetIntrinsic = require('../GetIntrinsic');
var callBound = require('../helpers/callBound');
var $TypeError = GetIntrinsic('%TypeError%');
var $indexOf = callBound('Array.prototype.indexOf', true) || callBound('String.prototype.indexOf');
var $push = callBound('Array.prototype.push');
var Get = require('./Get');
var IsArray = require('./IsArray');
var ToLength = require('./ToLength');
var ToString = require('./ToString');
var Type = require('./Type');
// https://ecma-international.org/ecma-262/6.0/#sec-createlistfromarraylike
module.exports = function CreateListFromArrayLike(obj) {
var elementTypes = arguments.length > 1
? arguments[1]
: ['Undefined', 'Null', 'Boolean', 'String', 'Symbol', 'Number', 'Object'];
if (Type(obj) !== 'Object') {
throw new $TypeError('Assertion failed: `obj` must be an Object');
}
if (!IsArray(elementTypes)) {
throw new $TypeError('Assertion failed: `elementTypes`, if provided, must be an array');
}
var len = ToLength(Get(obj, 'length'));
var list = [];
var index = 0;
while (index < len) {
var indexName = ToString(index);
var next = Get(obj, indexName);
var nextType = Type(next);
if ($indexOf(elementTypes, nextType) < 0) {
throw new $TypeError('item type ' + nextType + ' is not a valid elementType');
}
$push(list, next);
index += 1;
}
return list;
};
|
