shim.js 568 Bytes
'use strict';

var isFunction = require('../../function/is-function')

  , slice = Array.prototype.slice, defineProperty = Object.defineProperty
  , desc = { configurable: true, enumerable: true, writable: true, value: null };

module.exports = function (/*…items*/) {
	var result, i, l;
	if (!this || (this === Array) || !isFunction(this)) return slice.call(arguments);
	result = new this(l = arguments.length);
	for (i = 0; i < l; ++i) {
		desc.value = arguments[i];
		defineProperty(result, i, desc);
	}
	desc.value = null;
	result.length = l;
	return result;
};