For those of us who are getting to the party 3 years late, thank you.
Just my 2p for others learning: for me, Rc::RefCell was what I was missing, even after I thought I was up to speed. I was fine using Channels for inter-thread communication and I never needed Arc, but use of Rc is common in the Rust ecosystem and a lot of my early fights with the borrow checker weren't fights I needed to have. In situations where it wasn't a trivial change, and I found myself banging my head against the wall, it was often because I was in a situation that called for a reference counted cell.
Just my 2p for others learning: for me, Rc::RefCell was what I was missing, even after I thought I was up to speed. I was fine using Channels for inter-thread communication and I never needed Arc, but use of Rc is common in the Rust ecosystem and a lot of my early fights with the borrow checker weren't fights I needed to have. In situations where it wasn't a trivial change, and I found myself banging my head against the wall, it was often because I was in a situation that called for a reference counted cell.