Ram kikkupico
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| data Lst t = Nil | Head t (Lst t) | |
| instance Functor Lst where | |
| fmap f Nil = Nil | |
| fmap f (Head x xl) = Head (f x) (fmap f xl) | |
| instance Applicative Lst where | |
| pure x = Head x Nil | |
| Nil <*> _ = Nil | |
| _ <*> Nil = Nil |