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14 lines
442 B
Haskell
14 lines
442 B
Haskell
newtype CustomList a = CustomList [a] deriving Show
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instance Functor CustomList where
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fmap f (CustomList lst) = CustomList $ fmap f lst
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instance Applicative CustomList where
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pure x = CustomList $ repeat x
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{-
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-- default implementation
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pure x = CustomList [x]
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(CustomList fs) <*> (CustomList xs) = CustomList $ [f x | f <- fs, x <- xs]
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-}
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(CustomList fs) <*> (CustomList xs) = CustomList $ zipWith ($) fs xs
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