[Solved] SML functional programming higher order function?

by


Hint 1:

Compare the result of your ziprev with

List.zip [1,2,3,4] [10,20,30,40]

You should see a fairly obvious pattern.

Hint 2:

List.rev reverses a list.

Hint 3:

Can you use zipW to implement List.zip?
That is, if you want to say

normalzip xs ys = zipW something xs ys

what would something be?

solved SML functional programming higher order function?