[nivenkos]

By the way for the hashing example in count() - Rust has the Entry API for HashMaps to avoid exactly this problem: https://doc.rust-lang.org/std/collections/struct.HashMap.htm...

The PartialOrd trait also uses 3-way comparisons so I think the other issue is mitigated too, but it'd be interesting to check: https://doc.rust-lang.org/std/cmp/trait.PartialOrd.html#tyme...