This journaling will be mostly for myself, but I'm posting it to GitHub for posterity. This will be my 3rd year attempting to do the Advent of Code. I'm hoping to write down my thoughts as I tackle each challenge. This year, the theme will be Rust. I've used Ruby and Elixir the past two years, so this year I'll be getting in reps with a newer-to-me language.
With Ruby in 2019, I would write the code in different folders each day. Since it's a scripting
language, it was easy enough to just execute each program on its own. Last year, the Advent of
Code challenges included re-using a lot of code across days, and since Rust requires setting up
a new project just to run the code, plus I actually have to compile code now, I've decided to
write each of the challenges in a single project with a single entrypoint code. So running a
program requires running the same program, but with different arguments. e.g. calling
cargo run 1a will run the code for the first part of day 1, cargo run 2b will run the code
for the second part of day 2, etc.