Re: [Haskell-beginners] Maybe monad and computations

Am 07.09.2013 um 10:01 schrieb Emmanuel Touzery :

I got an helpful answer on stackoverflow that probably explains it all. Otherwise if i add the type, i'll have to bind it to a concrete monad due to the lack of typeclasses, that's why i didn't put a type. Thanks again.

Ok, that explains a lot. But if you need this kind of operation a lot, you could still have something like: liftMaybe2 :: (a -> b -> c) -> Maybe a -> Maybe b -> Maybe c liftMaybe2 f (Just a) (Just b) = Just $ f a b liftMaybe2 _ _ _ = Nothing Greetings, Daniel