mushroompot
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全栈,全干,全菜。 be a fullstack man, just for fun!
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函数式三板斧(map,filter,fold)
什么是 map,filter,fold map map 接受一个函数和一个列表,并将函数作用在列表中的每个元素上,最后返回函数作用后的列表。 Copy haskell 中map的类型签名 map :: (a -> b) -> [a] -> [b] racket 代码 (defin…
haskell
1 min
4 years ago
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