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21 lines
786 B
21 lines
786 B
// false -> Array#indexOf |
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// true -> Array#includes |
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var toIObject = require('./$.to-iobject') |
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, toLength = require('./$.to-length') |
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, toIndex = require('./$.to-index'); |
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module.exports = function(IS_INCLUDES){ |
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return function($this, el, fromIndex){ |
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var O = toIObject($this) |
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, length = toLength(O.length) |
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, index = toIndex(fromIndex, length) |
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, value; |
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// Array#includes uses SameValueZero equality algorithm |
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if(IS_INCLUDES && el != el)while(length > index){ |
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value = O[index++]; |
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if(value != value)return true; |
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// Array#toIndex 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; |
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} return !IS_INCLUDES && -1; |
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}; |
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}; |