In Haskell, how do you trim whitespace from the beginning and end of a string?

Question

How do you trim whitespace from the start and end of a string?

trim \"  abc \" 

=>

\"abc\"

Edit:

Ok, let me be a little cleare

Answer 1

Inefficient but easy to understand and paste in where needed:

strip = lstrip . rstrip
lstrip = dropWhile (`elem` " \t")
rstrip = reverse . lstrip . reverse