In the afternoon, I tried tackling another day of the Advent of Code 2023; and I actually made it. Nice stuff. But I saw a lot of comments on the subreddit regarding a new language, Uiua. It is very cryptic (because it uses glyphs for operations), but it sent me into a nice rabbithole of Youtube videos on that language and some others. Eventually, I came across a very interesting book that I think I'd fancy reading: Category Theory for Programmers.