Advent of Code 2022

Personal repo for https://adventofcode.com/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.