code: function swap(array, i, j) {
      var temp = array[i];
      array[i] = array[j];
      array[j] = temp;
    }
docs: Swaps the elements at two specified positions of an array.
  
  @private
  @param {Array} array
  @param {number} i
  @param {number} j
  
  @examples
  var array = [1, 2, 3, 4, 5];
  
  swap(array, 2, 3) // array == [1, 2, 4, 3, 5]