Last change
on this file since 8d391a1 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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[6a3a178] | 1 | 'use strict';
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| 2 | /* eslint-disable es/no-array-prototype-indexof -- required for testing */
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| 3 | var $ = require('../internals/export');
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| 4 | var $indexOf = require('../internals/array-includes').indexOf;
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| 5 | var arrayMethodIsStrict = require('../internals/array-method-is-strict');
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| 6 |
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| 7 | var nativeIndexOf = [].indexOf;
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| 8 |
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| 9 | var NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
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| 10 | var STRICT_METHOD = arrayMethodIsStrict('indexOf');
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| 11 |
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| 12 | // `Array.prototype.indexOf` method
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| 13 | // https://tc39.es/ecma262/#sec-array.prototype.indexof
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| 14 | $({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD }, {
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| 15 | indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
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| 16 | return NEGATIVE_ZERO
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| 17 | // convert -0 to +0
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| 18 | ? nativeIndexOf.apply(this, arguments) || 0
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| 19 | : $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
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| 20 | }
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| 21 | });
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