adventofcode.sh VS adventofcode

I have completed years 2015 and 2020 in bash. Gave up halfway through last year, might do that one day. https://github.com/einarjon/adventofcode.sh

Python3 is about 25% faster than Python2, with the exact same code. Pypy3 was somewhere in between. https://github.com/einarjon/adventofcode.sh/blob/main/2015/04.sh

Mine is on github too. I think that my worst abuse of grep is this: https://github.com/einarjon/adventofcode.sh/blob/main/19.sh Before the cleanup my part2 regex was around 6-7K chars.

My final script is in my repo, but an earlier commit has this brute force version. https://github.com/einarjon/adventofcode.sh in the 2021 folder.

Day 1 was 10 LOC, each day is adding about 10 LOC, so now I'm at 40. I don't like where this is heading. https://github.com/einarjon/adventofcode.sh/blob/main/2021/04.sh Small mistake in Part 2 so it starts the bingo from the beginning, but the first numbers are crossed out. Doesn't affect the result.

My solution this year was almost exactly like the one __abigail__ posted. I based it on last year's code for day 12. There are 50 days worth of bash solutions in that repo if you're interested. Some contain Voodoo, but it's mostly readable - I hope...

I linked to the code. Here it is again. Might be slower in git bash, but works. https://github.com/einarjon/adventofcode.sh/blob/main/13.sh

This lets you cut out the relatively expensive fcount.remove(0) operation, and each loop is basically one addition and a few assignments. Full solution here.

Code

Your solution is pretty much exactly the super concise version of my definitely over-engineered solution.

You can see the code here

Here's my solution

Your solution looks remarkably similar to my Rust solution which solves both parts in 1.6s on the cheap NUC I use as my coding workstation.

It's in Rust, so I'm not sure how readable you'll find it, but in case it helps, you can see the code here.

I found a single crate with a bunch of binaries worked well. It let me use a shared library easily. You can see my crate organization here if that's helpful.

You can see my code here in case it helps.