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8 lines
343 B
8 lines
343 B
// 7.3.20 SpeciesConstructor(O, defaultConstructor) |
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var anObject = require('./$.an-object') |
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, aFunction = require('./$.a-function') |
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, SPECIES = require('./$.wks')('species'); |
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module.exports = function(O, D){ |
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var C = anObject(O).constructor, S; |
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return C === undefined || (S = anObject(C)[SPECIES]) == undefined ? D : aFunction(S); |
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}; |