Javascript Array xorArray(arr)

// [49,50,51] ^ [52,53,54] = [5,7,5]
Array.prototype.xorArray = function(arr) {
 if (this.length != arr.length) {
  return new Error("Two Arrays length is different!");
 }
 var xorArr = new Array();
 for (var i = 0; i < this.length; i++) {
  xorArr[i] = this[i] ^ arr[i];/*from  w  w w  . j  a  va2 s . co m*/
 }
 return xorArr;
};