alexey.skladnoy:
> Hello
>
> I found that there is no monadic map for vector. It's possible to define to
> define such map using conversion to list, but I suppose it's not efficient. I
> didn't make any measurements.
>
> > mapM' :: Monad m => (a -> m b) -> V.Vector a -> m (V.Vector b)
> > mapM' f = return . V.fromList <=< mapM f . V.toList
>
> Any suggestions about implementation of such function?
> Specifically I want to use Random monad.
>
There's a tutorial here on usving vectors,
http://haskell.org/haskellwiki/Numeric_Haskell:_A_Vector_Tutorial#Random_numbers
mapM is available via Fusion.Stream.Monadic.mapM
-- Don
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