Advent of Code 2022

Main goal is practicing new languages, just getting things to work.

Lessons learnt

Day 1
- IntelliJ plugin can support multiple Rust projects under a root directory. Just "attach" them selecting the Cargo.toml file.** unwrap causes move. Can’t unwrap the same reference twice.
Day 2
- Use regex to validate input valid lines.
Day 3
- Writing unit tests for TDD approach. IntelliJ can run & debug tests normally same as Java.
- Abstracting char as a struct required (done for exercising, in this case it adds code and complexity. Hoping the 0-cost-abstraction promise is true):
  - Derive Debug for printing the Vector containing it
  - Implement PartialEq trait to use Vec::contains
Day 4
- A method can return multiple values, and that tuple CAN’T be passed to a method directly.
- Practice with '?' operand: it cannot be used for quick replacement of unwrap for tests :'(
- Beware using constructor without named args. If the var name is the same, order is not respected.