It's Advent of Code time again! I probably won't document every day like I did last year, but may write up some stuff as I get into the chunkier puzzles.
Everything is in C# again this year. I have no intention of keeping up with this every day, but may try to at least beat all the puzzles... eventually.
This one, for me, is notable mostly because it gave me an excuse to play with generic math to create a Range<T> type that can theoretically be used for different numeric types. I'm not 100% sure what I'm doing there, but it works for integers, so far. Also, I'm kind of abusing records here as a lazy way of destructuring what is effectively a list of values, since C# does not have array destructuring built-in. It had the added bonus of giving me the ability to apply a transformation to my soon-to-be-destructured values.
I think I write a basic Grid and Vector class every year. I suppose I could've used last year's implementation, but each time I write it gets... maybe not better, but different. Last year I really couldn't decide if my Grid API should take an x and y value, or a Point, or a Vector, or whatever. I had a lot of different ways of representing "two values". This year I think I'll mostly stick to my own Vector2<T> class. Re-inventing the wheel here, but it's all for fun. In retrospect, my Range type could probably have just been a Vector2<T> as well. Maybe I'll refactor at some point.