source: imaps-frontend/node_modules/es-abstract/2021/CreateListFromArrayLike.js

main
Last change on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago

Update repo after prototype presentation

  • Property mode set to 100644
File size: 1.3 KB
Line 
1'use strict';
2
3var callBound = require('call-bind/callBound');
4
5var $TypeError = require('es-errors/type');
6var $indexOf = callBound('Array.prototype.indexOf', true) || callBound('String.prototype.indexOf');
7var $push = callBound('Array.prototype.push');
8
9var Get = require('./Get');
10var IsArray = require('./IsArray');
11var LengthOfArrayLike = require('./LengthOfArrayLike');
12var ToString = require('./ToString');
13var Type = require('./Type');
14
15var defaultElementTypes = ['Undefined', 'Null', 'Boolean', 'String', 'Symbol', 'Number', 'BigInt', 'Object'];
16
17// https://262.ecma-international.org/11.0/#sec-createlistfromarraylike
18
19module.exports = function CreateListFromArrayLike(obj) {
20 var elementTypes = arguments.length > 1
21 ? arguments[1]
22 : defaultElementTypes;
23
24 if (Type(obj) !== 'Object') {
25 throw new $TypeError('Assertion failed: `obj` must be an Object');
26 }
27 if (!IsArray(elementTypes)) {
28 throw new $TypeError('Assertion failed: `elementTypes`, if provided, must be an array');
29 }
30 var len = LengthOfArrayLike(obj);
31 var list = [];
32 var index = 0;
33 while (index < len) {
34 var indexName = ToString(index);
35 var next = Get(obj, indexName);
36 var nextType = Type(next);
37 if ($indexOf(elementTypes, nextType) < 0) {
38 throw new $TypeError('item type ' + nextType + ' is not a valid elementType');
39 }
40 $push(list, next);
41 index += 1;
42 }
43 return list;
44};
Note: See TracBrowser for help on using the repository browser.