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
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