Re: [Haskell-beginners] mapM etc.

On Fri, Jul 1, 2011 at 10:48 PM, Alexey G wrote:

Try this:

...

mapM (\x -> getDeviceInfo x >>= print . name) [0..10]

Though they're not very well known, Control.Monad now contains "composition" monad operators, so you can just write :

mapM_ (getDeviceInfo >=> print . name) [0..10]

which is pretty elegant (to my eyes at least). (>=>) :: (a -> m b) -> (b -> m c) -> a -> m c -- Jedaï