code: function(module, exports) {
  
  	/**
  	 * Private `concat` function to merge two array-like objects.
  	 *
  	 * @private
  	 * @param {Array|Arguments} [set1=[]] An array-like object.
  	 * @param {Array|Arguments} [set2=[]] An array-like object.
  	 * @return {Array} A new, merged array.
  	 * @example
  	 *
  	 *      _concat([4, 5, 6], [1, 2, 3]); //=> [4, 5, 6, 1, 2, 3]
  	 */
  	function _concat(set1, set2) {
  	  set1 = set1 || [];
  	  set2 = set2 || [];
  	  var idx;
  	  var len1 = set1.length;
  	  var len2 = set2.length;
  	  var result = [];
  	
  	  idx = 0;
  	  while (idx < len1) {
  	    result[result.length] = set1[idx];
  	    idx += 1;
  	  }
  	  idx = 0;
  	  while (idx < len2) {
  	    result[result.length] = set2[idx];
  	    idx += 1;
  	  }
  	  return result;
  	}
  	module.exports = _concat;
  
  /***/ }
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