I have to second the use of immutable data structures. That is the style I'd adopted prior to using rust, and in learning Rust I've found that I've hardly ever

I have to second the use of immutable data structures. That is the style I'd adopted prior to using rust, and in learning Rust I've found that I've hardly ever fought with the borrow checker. Suggesting unsafe code seems like a bad move, if haven't mastered the borrow checker, is learning the dark magic of unsafe a good plan?