[Haskell-beginners] a simple little problem

[Ertugrul Soeylemez]

Mihai Maruseac <mihai.maruseac at gmail.com> wrote:

> I'd go by:
>
> fn l = let l' = filter (/= Nothing) l in if l' == [] then Nothing else head l'

If you want to disregard the useful Monoid instance of Maybe, then here
is a nicer way to express this:

    fn :: [Maybe a] -> Maybe a
    fn = listToMaybe . catMaybes


Greets,
Ertugrul


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