I have what I thought was a broad knowledge base of rust an experience in it over many domains, but I haven't heard of most of those. Have been getting by with `&`, and `&mut` only from those tables!

Incidentally, I think this is one of Rust's best features, and I sorely miss it in Python, JS and other languages. They keep me guessing whether a function will mutate the parent structure, or a local copy in those languages!

Incidentally, I recently posted in another thread here how I just discovered the 'named loop/scope feature, and how I thought it was great, but took a while to discover. A reply was along the effect of "That's not new; it's a common feature". Maybe I don't really know rust, but a dialect of it...