Haskell Matrix Library...

[Bulat Ziganshin]

Hello Keean,

Tuesday, June 14, 2005, 3:54:08 PM, you wrote:

KS>     class Functor m where
KS>        fmap :: a -> b -> m a -> m b

KS>     But the type of "mmap" is

KS>     mmap :: e -> e -> Matrix a i e -> Matrix a i e

KS>     in other words we map values to the same type, not a different type.

mmap should be

mmap :: (e -> e1) -> Matrix a i e -> Matrix a i e1

for example, we can map matrix of strings to matrix of its lengths


-- 
Best regards,
 Bulat                            mailto:bulatz at HotPOP.com