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var $ = require('./$') |
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, toIObject = require('./$.to-iobject'); |
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module.exports = function(object, el){ |
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var O = toIObject(object) |
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, keys = $.getKeys(O) |
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, length = keys.length |
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, index = 0 |
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, key; |
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while(length > index)if(O[key = keys[index++]] === el)return key; |
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}; |
