input: Write a function to design an algorithm in Python that takes an array and sorts it in ascending order using Python's built-in sort function. If the array is empty, return the same empty array.
  
  def sort_ascending(array):
    array.sort()
    return array
  
  assert sort_ascending([10, 3, 9, 1, 15, 2]) == [1, 2, 3, 9, 10, 15]
  assert sort_ascending([]) == []
output: def sort_ascending(array):
    array.sort()
    return array