e-lado/node_modules0/core-js/library/modules/$.array-species-create.js

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// 9.4.2.3 ArraySpeciesCreate(originalArray, length)
var isObject = require('./$.is-object')
  , isArray  = require('./$.is-array')
  , SPECIES  = require('./$.wks')('species');
module.exports = function(original, length){
  var C;
  if(isArray(original)){
    C = original.constructor;
    // cross-realm fallback
    if(typeof C == 'function' && (C === Array || isArray(C.prototype)))C = undefined;
    if(isObject(C)){
      C = C[SPECIES];
      if(C === null)C = undefined;
    }
  } return new (C === undefined ? Array : C)(length);
};