44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
'use strict';
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var callBound = require('call-bound');
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var $TypeError = require('es-errors/type');
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var isObject = require('es-object-atoms/isObject');
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var $indexOf = callBound('Array.prototype.indexOf', true) || callBound('String.prototype.indexOf');
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var Get = require('./Get');
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var IsArray = require('./IsArray');
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var ToLength = require('./ToLength');
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var ToString = require('./ToString');
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var Type = require('./Type');
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var defaultElementTypes = ['Undefined', 'Null', 'Boolean', 'String', 'Symbol', 'Number', 'Object'];
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// https://262.ecma-international.org/6.0/#sec-createlistfromarraylike
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module.exports = function CreateListFromArrayLike(obj) {
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var elementTypes = arguments.length > 1
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? arguments[1]
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: defaultElementTypes;
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if (!isObject(obj)) {
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throw new $TypeError('Assertion failed: `obj` must be an Object');
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}
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if (!IsArray(elementTypes)) {
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throw new $TypeError('Assertion failed: `elementTypes`, if provided, must be an array');
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}
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var len = ToLength(Get(obj, 'length'));
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var list = [];
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var index = 0;
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while (index < len) {
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var indexName = ToString(index);
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var next = Get(obj, indexName);
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var nextType = Type(next);
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if ($indexOf(elementTypes, nextType) < 0) {
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throw new $TypeError('item type ' + nextType + ' is not a valid elementType');
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}
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list[list.length] = next;
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index += 1;
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}
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return list;
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};
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