alt Hacker NewsYes, because foldr is equivalent to for_, that is, iterating over a container and performing an effectful action (what in other languages would be called "doing something") for each element. Uses of foldr can always be rewritten to uses of for_, and I find things much clearer in terms of for_!
(This is explained in my article "foldl traverses with State, foldr traverses with anything": https://h2.jaguarpaw.co.uk/posts/foldl-traverses-state-foldr...)
Well, `foldr` is (up to interdefinability) just the implementation of `for_` (or `traverse`) in the case of lists, in the same way that `map` is the implementation of `fmap`. The point of `traverse` is that it's provided by the functor.
The question of whether to use the most generic (for consistency) or the least generic (for directness) name for a function is the old bugbear of the Prelude :)