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Haskell

Name: Anonymous 2009-10-05 12:37

How the fuck do you write a pointless concatMapM?

Name: Anonymous 2009-10-05 12:57

No seriously guys.

concatMapM f xs = do

    xs'

 <- mapM f xs

    return $ concat xs'

works fine,

liftM concat . mapM
and
((return . concat) =<<) . mapM
give me a wierd type signature: (Monad ((->) [a])) => (a -> [b]) -> [a] -> [b]

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