What about fold?

In rust iterators there's both fold (you supply the initial value) and reduce (it uses the first element as the initial value, doesn't work on empty iterators)

https://doc.rust-lang.org/std/iter/trait.Iterator.html#metho...

https://doc.rust-lang.org/std/iter/trait.Iterator.html#metho...

Why? It does, after all, reduce a collection to a single value.

In the book "Simply Scheme", map is "every", filter is "keep", and reduce is "accumulate".