| ZVON > References > Haskell reference |
| Intro / Search / ZVON |
| | Indexes | Syntax | >> Prelude << | Ratio | Complex | Numeric | Ix | Array | List | Maybe | Char | Monad | IO | Directory | System | Time | Locale | CPUTime | Random |
| Module: | Prelude |
|---|---|
| Class: | Functor |
| Instances: | [], IO, Maybe |
class Functor f where
fmap :: (a -> b) -> f a -> f b
instance Functor Maybe where
fmap f Nothing = Nothing
fmap f (Just x) = Just (f x)
instance Functor IO where fmap f x = x >>= (return . f)
instance Functor [] where
fmap = map
|
|
|
| answering service | water softener | MSN | Alojamiento Web | UNLIMITED Web Hosting by HostDepartment |
| VoIP Internettelefonie | Hosted Exchange, SDSL | VoIP Internettelefonie AT | VoIP Internettelefonie DE |