8 Apr
2010
8 Apr
'10
4:01 p.m.
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_num... mapM is available via Fusion.Stream.Monadic.mapM -- Don