References
Rust reference
Understand ownership and safe systems code.
Rust Basics
Bind values and print them.
Rust Ownership
Borrow a string without moving it.
Rust Variables, Mutability, and Shadowing
Bindings are immutable by default; mut and shadowing change that.
Rust Enums and match
Model alternatives with an enum and handle each one with match.
Rust Vectors
Store a growable list with Vec and sum it with an iterator.