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23 lines
924 B
23 lines
924 B
// false -> Array#indexOf |
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// true -> Array#includes |
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var toIObject = require('./_to-iobject'); |
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var toLength = require('./_to-length'); |
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var toAbsoluteIndex = require('./_to-absolute-index'); |
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module.exports = function (IS_INCLUDES) { |
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return function ($this, el, fromIndex) { |
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var O = toIObject($this); |
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var length = toLength(O.length); |
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var index = toAbsoluteIndex(fromIndex, length); |
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var value; |
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// Array#includes uses SameValueZero equality algorithm |
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// eslint-disable-next-line no-self-compare |
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if (IS_INCLUDES && el != el) while (length > index) { |
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value = O[index++]; |
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// eslint-disable-next-line no-self-compare |
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if (value != value) return true; |
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// Array#indexOf ignores holes, Array#includes - not |
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} else for (;length > index; index++) if (IS_INCLUDES || index in O) { |
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if (O[index] === el) return IS_INCLUDES || index || 0; |
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} return !IS_INCLUDES && -1; |
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}; |
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};
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