source: frontend/node_modules/es-abstract/2025/CreateListFromArrayLike.js

Last change on this file was 9af201e, checked in by MBK <marija.karapandzova@…>, 12 days ago

Fix frontend appearance

  • Property mode set to 100644
File size: 1.2 KB
Line 
1'use strict';
2
3var $TypeError = require('es-errors/type');
4var isObject = require('es-object-atoms/isObject');
5
6var Get = require('./Get');
7var LengthOfArrayLike = require('./LengthOfArrayLike');
8var ToString = require('./ToString');
9
10var isPropertyKey = require('../helpers/isPropertyKey');
11
12// https://262.ecma-international.org/16.0/#sec-createlistfromarraylike
13
14module.exports = function CreateListFromArrayLike(obj) {
15 var validElementTypes = arguments.length > 1
16 ? arguments[1]
17 : 'ALL'; // step 1
18
19 if (validElementTypes !== 'ALL' && validElementTypes !== 'PROPERTY-KEY') {
20 throw new $TypeError('Assertion failed: `validElementType` must be ~ALL~ or ~PROPERTY-KEY~');
21 }
22
23 if (!isObject(obj)) {
24 throw new $TypeError('Assertion failed: `obj` must be an Object'); // step 2
25 }
26
27 var len = LengthOfArrayLike(obj); // step 3
28 var list = []; // step 4
29 var index = 0; // step 5
30 while (index < len) { // step 6
31 var indexName = ToString(index); // step 6.a
32 var next = Get(obj, indexName); // step 6.b
33 if (validElementTypes === 'PROPERTY-KEY' && !isPropertyKey(next)) {
34 throw new $TypeError('item ' + indexName + ' is not a valid property key'); // step 6.c
35 }
36 list[list.length] = next; // step 6.d
37 index += 1; // step 6.e
38 }
39 return list; // step 7
40};
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