Re: [Haskell-beginners] mapM etc.

2 Jul 2011


      On Sat, Jul 2, 2011 at 9:55 AM, Chaddaï Fouché  wrote:
...
On Fri, Jul 1, 2011 at 10:48 PM, Alexey G  wrote:
...
Try this:
...
mapM (\x -> getDeviceInfo x >>= print . name) [0..10]
...
mapM_ (getDeviceInfo >=> print . name) [0..10]
Or maybe, to be more consistent order-wise :
...
mapM_ (print . name <=< getDeviceInfo) [0..10]
...
(>=>) :: (a -> m b) -> (b -> m c) -> a -> m c
Oops, forgot the constraint :

(>=>) :: Monad m => (a -> m b) -> (b -> m c) -> (a -> m c)

--
Jedaï