git.r.bdr.sh - rbdr/dotfiles/blob

   1 'use strict';
   2
   3 var setPrototypeOf = require('../object/set-prototype-of')
   4   , isExtensible   = require('./_is-extensible');
   5
   6 module.exports = (function () {
   7         var SubArray;
   8
   9         if (isExtensible) return require('./_sub-array-dummy');
  10
  11         if (!setPrototypeOf) return null;
  12         SubArray = function () {
  13                 var arr = Array.apply(this, arguments);
  14                 setPrototypeOf(arr, SubArray.prototype);
  15                 return arr;
  16         };
  17         setPrototypeOf(SubArray, Array);
  18         SubArray.prototype = Object.create(Array.prototype, {
  19                 constructor: { value: SubArray, enumerable: false, writable: true,
  20                         configurable: true }
  21         });
  22         return SubArray;
  23 }());