Finally got around to doing Day 4. That was fun. I'm really happy my decision to completely overengineer my Part 1 solution meant that Part 2 took all of minute to code.

@MBraedley is slacking!

@Wipqozn Yeah, I'm working on today's I spent a little while trying to figure out if there was a more intelligent way of doing it than just tracking all the boards

My problem with Day 4 was not realizing they didn't count diagonals.

@Batophobia Oof

That would make things a lot more difficult

I specifically checked the puzzle for that lol

My Day 4 solutions had some cool uses of numpy, imo

Here's my aoc2021 repo, if anyone's interested: github.com/SaintWacko/aoc2021

@Batophobia lol

Day 5 completed

Okay, who here is good at numpy?

I seem to be fundamentally misunderstanding something

I think I've used numpy a few times, a few years ago, so sadly not I.

Actually maybe I used it last year I can't remember.

I really only use python now for advent of code and quick little scripts at works. Most of my daily usage is in C# now.

Okay day5 done.

I think last year or the year before there was a very, very similar puzzle.

The number of times I've written similar code you think I'd be able to do it without making the same mistakes each time

Yes, finished day 5

Lost too much time to figuring out what I had messed up with numpy

My code would be way cleaner if I knew how to save a reference to an area of a numpy array

Does arr[x:y,z:w] work?

Oh wait, just figured it out

So that's how you slice an array

But by default if you assign to that, it doesn't modify the original object

So if I said area = arr[x:y,z:w] and then said area = area + 1

It wouldn't modify arr

You have to do area[:] = area + 1

...Okay, well that worked for part 1, but not part 2

Nevermind, forgot the [:] lol

@fredley hasn't done Advent of Code at all this year! What a loser!