Wiki. “Haskell” [Haskell]

Haskell 是一种函数式编程语言.

下载与配置

下载 https://www.haskell.org/downloads/

例

:t (2+) (2+) :: Num a => a -> a

take 5 [1,4..] [1,4,7,10,13]

f x y = x + y :t f `f :: Num a => a -> a -> a

f x = x < 3 :t f `f :: (Ord a, Num a) => a -> Bool

g = (<3) :t g `g :: (Ord a, Num a) => a -> Bool

f x y = (x == y) :t f `f :: Eq a => a -> a -> Bool