Nodejs Utililty Methods Array Radix Sort

Array.prototype.radixSort = function () {
  var key, i, j, stack;
  var bucket = [[].concat(this)];
  var sorted = false;
  var digits = 1;
  while (!sorted) {
    var nextBucket = [];
    sorted = true;
    var nextDigits = digits * 10;
...

Array.prototype.radixSort = function(maxDigit) {
  var dev = 1;
  var mod = 10;
  var arr= [];
  for (var i = 10; i >= 0; i--) {
    arr[i] = [];
  for(var i = 0; i < maxDigit; i++,dev *= 10, mod *= 10) {
    for(var z = 0; z < this.length; z++) {
...