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23 lines
973 B
JavaScript
23 lines
973 B
JavaScript
'use strict';
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var $ = require('../internals/export');
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var $indexOf = require('../internals/array-includes').indexOf;
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var arrayMethodIsStrict = require('../internals/array-method-is-strict');
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var arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');
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var nativeIndexOf = [].indexOf;
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var NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
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var STRICT_METHOD = arrayMethodIsStrict('indexOf');
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var USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
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// `Array.prototype.indexOf` method
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// https://tc39.github.io/ecma262/#sec-array.prototype.indexof
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$({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD || !USES_TO_LENGTH }, {
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indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
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return NEGATIVE_ZERO
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// convert -0 to +0
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? nativeIndexOf.apply(this, arguments) || 0
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: $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
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}
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});
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