input: Write a function to shuffle elements in an array.
  assert len(shuffleArray([1, 2, 3, 4, 5])) == 5
  assert sorted(shuffleArray([1, 2, 3, 4, 5])) == [1, 2, 3, 4, 5]
  assert len(shuffleArray(['a', 'b', 'c', 'd'])) == 4
output: import random
  
  def shuffleArray(arr):
      shuffled_arr = arr[:]
      random.shuffle(shuffled_arr)
      return shuffled_arr