16 May
2008
16 May
'08
12:13 p.m.
Seems to be close to sequence :: [ListT m a] -> ListT m a Hmm? On 16 May 2008, at 14:12, Alistair Bayley wrote:
A couple of days ago I had need for:
concatM :: Monad m => [m [a]] -> m [a] concatM = liftM concat . sequence
but found no such thing in the std libs, except perhaps for msum (I don't want to add instances for MonadPlus. Should I have to?). Have I missed something trivial?
Alistair _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe