You linked to the docs for the result type of `map`, not`map` itself. The method is here: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.map htt

You linked to the docs for the result type of `map`, not`map` itself. The method is here: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.map https://doc.rust-lang.org/std/iter/trait.Iterator.html#metho...