code: function() {
        var arr = this.concat(), i = arr.length, j, x;
        while(i) {
          j = (math.random() * i) | 0;
          x = arr[--i];
          arr[i] = arr[j];
          arr[j] = x;
        }
        return arr;
      }
docs: *
  @method randomize()
  @returns Array
  @short Returns a copy of the array with the elements randomized.
  @extra Uses Fisher-Yates algorithm.
  @example
  
  [1,2,3,4].randomize()  -> [?,?,?,?]
  
  *