In Haskell, the latter looks like: alist = (map (**2) . filter (\x -> x `mod` 3 == 0)) myList Or: alist = (map (**2) . filter ((== 0) . (`mod` 3))) myLis

In Haskell, the latter looks like: alist = (map (**2) . filter (\x -> x `mod` 3 == 0)) myList Or: alist = (map (**2) . filter ((== 0) . (`mod` 3))) myList If alist is a transformation, and not applied to myList, it's cleaner: alist = map (**2) . filter ((== 0) . (`mod` 3)) Though Haskell also has list comprehensions, with more "mathy" syntax: alist = [x**2 | x <- mylist, x `mod` 3 == 0]