code: function(arr) {
          for (var i = 0; i < arr.length; i++) {
            var randIndex = Math.floor(Math.random() * arr.length);
            var temp = arr[randIndex];
            arr[randIndex] = arr[i];
            arr[i] = temp;
          }
          return arr;
        }
docs: Randomly shuffles items in an array.
  
  shuffle :: (arr) → arr
  
  @param arr - An array to be shuffled
  @returns A shuffled array