main
Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
Update repo after prototype presentation
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File size:
894 bytes
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1 | 'use strict';
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2 |
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3 | var GetIntrinsic = require('get-intrinsic');
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4 | var hasPropertyDescriptors = require('has-property-descriptors')();
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5 |
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6 | var $TypeError = require('es-errors/type');
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7 | var $defineProperty = hasPropertyDescriptors && GetIntrinsic('%Object.defineProperty%', true);
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8 |
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9 | var iterProto = require('iterator.prototype');
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10 | var callBound = require('call-bind/callBound');
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11 |
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12 | var $isPrototypeOf = callBound('Object.prototype.isPrototypeOf');
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13 |
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14 | var $Iterator = typeof Iterator === 'function' ? Iterator : function Iterator() {
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15 | if (
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16 | !(this instanceof Iterator)
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17 | || this.constructor === Iterator
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18 | || !$isPrototypeOf(Iterator, this.constructor)
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19 | ) {
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20 | throw new $TypeError('`Iterator` can not be called or constructed directly');
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21 | }
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22 | };
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23 |
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24 | if ($Iterator.prototype !== iterProto) {
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25 | $Iterator.prototype = iterProto;
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26 | }
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27 | $defineProperty($Iterator, 'prototype', { writable: false });
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28 |
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29 | module.exports = $Iterator;
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