28 lines
909 B
JavaScript
28 lines
909 B
JavaScript
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'use strict';
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var $export = require('./_export')
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, html = require('./_html')
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, cof = require('./_cof')
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, toIndex = require('./_to-index')
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, toLength = require('./_to-length')
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, arraySlice = [].slice;
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// fallback for not array-like ES3 strings and DOM objects
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$export($export.P + $export.F * require('./_fails')(function(){
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if(html)arraySlice.call(html);
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}), 'Array', {
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slice: function slice(begin, end){
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var len = toLength(this.length)
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, klass = cof(this);
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end = end === undefined ? len : end;
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if(klass == 'Array')return arraySlice.call(this, begin, end);
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var start = toIndex(begin, len)
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, upTo = toIndex(end, len)
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, size = toLength(upTo - start)
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, cloned = Array(size)
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, i = 0;
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for(; i < size; i++)cloned[i] = klass == 'String'
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? this.charAt(start + i)
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: this[start + i];
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return cloned;
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}
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});
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