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Last change
on this file was 9af201e, checked in by MBK <marija.karapandzova@…>, 12 days ago |
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Fix frontend appearance
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-
Property mode
set to
100644
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File size:
1.2 KB
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| 1 | 'use strict';
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| 2 |
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| 3 | var $TypeError = require('es-errors/type');
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| 4 | var isObject = require('es-object-atoms/isObject');
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| 5 |
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| 6 | var Get = require('./Get');
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| 7 | var LengthOfArrayLike = require('./LengthOfArrayLike');
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| 8 | var ToString = require('./ToString');
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| 9 |
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| 10 | var isPropertyKey = require('../helpers/isPropertyKey');
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| 11 |
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| 12 | // https://262.ecma-international.org/16.0/#sec-createlistfromarraylike
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| 13 |
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| 14 | module.exports = function CreateListFromArrayLike(obj) {
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| 15 | var validElementTypes = arguments.length > 1
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| 16 | ? arguments[1]
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| 17 | : 'ALL'; // step 1
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| 18 |
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| 19 | if (validElementTypes !== 'ALL' && validElementTypes !== 'PROPERTY-KEY') {
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| 20 | throw new $TypeError('Assertion failed: `validElementType` must be ~ALL~ or ~PROPERTY-KEY~');
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| 21 | }
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| 22 |
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| 23 | if (!isObject(obj)) {
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| 24 | throw new $TypeError('Assertion failed: `obj` must be an Object'); // step 2
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| 25 | }
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| 26 |
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| 27 | var len = LengthOfArrayLike(obj); // step 3
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| 28 | var list = []; // step 4
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| 29 | var index = 0; // step 5
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| 30 | while (index < len) { // step 6
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| 31 | var indexName = ToString(index); // step 6.a
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| 32 | var next = Get(obj, indexName); // step 6.b
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| 33 | if (validElementTypes === 'PROPERTY-KEY' && !isPropertyKey(next)) {
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| 34 | throw new $TypeError('item ' + indexName + ' is not a valid property key'); // step 6.c
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| 35 | }
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| 36 | list[list.length] = next; // step 6.d
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| 37 | index += 1; // step 6.e
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| 38 | }
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| 39 | return list; // step 7
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| 40 | };
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