There's nothing stopping you from doing a functional style in Rust, neither: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=bd83ad8f79c

There's nothing stopping you from doing a functional style in Rust, neither: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=bd83ad8f79c7a5db63c31c156e95bf6b https://play.rust-lang.org/?version=stable&mode=debug&editio... There is a function on nightly that would make line 16 a little nicer, but oh well.