※ 引述《scwg ( )》之铭言：
: ※ 引述《huei1224 (渣)》之铭言：
: : 最近在学 haskell ，发现 haskell 也可以写成像上面的型式，分享一下
: : let x -: f = f x
: : let xs = [-3..3]
: : let square = (^2)
: : let isGreaterThan5 = (>5)
: : let result = xs -: map square -: filter isGreaterThan5 -: length
: :

Good thinking :) It's just that I think it's more naturalto learn monad before arrow/category.

true, thanks! actually i don't really get arrow yet..

flip ($) xs ＝ ($ xs)

good point, thanks!