Paramorphisms / Data.Scanable?

[Bulat Ziganshin]

Hello Jim,

Sunday, February 4, 2007, 7:36:13 AM, you wrote:

> class Scannable t where
>     scanr :: (a -> b -> b) -> b -> t a -> t b
>     scanl :: (a -> b -> a) -> a -> t b -> t a
>     scanr1 :: (a -> a -> a) -> t a -> t a
>     scanl1 :: (a -> a -> a) -> t a -> t a

for me it seems that these operations are generalization of fmap and
fmap can be implemented via scnal/scanr


-- 
Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com