What do you mean by the last paragraph? foldl in Haskell is just foldl _ acc [] = acc foldl f acc (x:xs) = foldl f (f acc x) xs And in Python some

What do you mean by the last paragraph? foldl in Haskell is just foldl _ acc [] = acc foldl f acc (x:xs) = foldl f (f acc x) xs And in Python something like def foldl(f, acc, l): for x in l: acc = f(acc, x) return acc Which doesn't seem much harder to read or write than any other version, to me (it's all just syntax around the same algorithm).