Groovy: How do I sort an ArrayList of String:s in length-of-string order?

How do I sort an ArrayList of String:s in length-of-string order in Groovy?

Code:

def words = ['groovy', 'is', 'cool']
// your code goes here:
// code that sorts words in ascending length-of-word order
assert words == ['is', 'cool', 'groovy']

There are certainly more than one way to do it - so I'll grant the answer to the person who provides the most elegant solution.

From stackoverflow

• words = words.sort { it.size() }
  

  To get descending order

  words = words.sort { -it.size() }
  

  knorv : words = words.sort { it.size() } is ascending. Very nice! Thanks a lot!