I don't think those kinds of exercises will teach you about functional programming... Here's why. You can understand imperative programming as a sequence of operations. But functional programming is more like a composition of transformations. It really requires study because you need to think differently.
I would suggest rewriting the standard library of a functional language.... Read the standard functions on lists, maps, tuples, folds, maps, and reimplement them...
I would suggest rewriting the standard library of a functional language.... Read the standard functions on lists, maps, tuples, folds, maps, and reimplement them...