[Haskell-beginners] repetition

[Thomas Davie]

On 4 Aug 2011, at 10:31, Luca Ciciriello wrote:

> Hi All.
> Is there any function in Prelude that removes the repeated elements in a list? 
> 
> In example I've a list like this one: xs = ["3","3","3","3","3","4","4","4","4","4","5","5","5","5","5","6","6","6","6","6","6","6"]
> 
> I need a function f such that f xs = ["3","4","5","6"]
> 
> thanks in advance for any answer.

map head . group

Bob