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16 lines
464 B
JavaScript
16 lines
464 B
JavaScript
var isObject = require('./_is-object')
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, isArray = require('./_is-array')
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, SPECIES = require('./_wks')('species');
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module.exports = function(original){
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var C;
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if(isArray(original)){
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C = original.constructor;
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// cross-realm fallback
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if(typeof C == 'function' && (C === Array || isArray(C.prototype)))C = undefined;
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if(isObject(C)){
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C = C[SPECIES];
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if(C === null)C = undefined;
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}
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} return C === undefined ? Array : C;
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}; |