Stream: roctoberfest

Topic: 2023 day 5

Elias Mulhall (Oct 05 2023 at 14:14):

Day 5 https://github.com/mulias/roctoberfest/blob/main/advent_2022/day_05/main.roc

• This is one of those puzzles where parsing the full input is foolish because it's complicated and easy to hard code, but I did it anyways. I had previously written this parser in my own parser language so I already knew the shape of the thing, but I did have to implement 2d matrix transpose to get the data in the format I wanted.
• Ended up writing an orCrash helper, dealing with Err values as localized fatal errors is just easier for this kind of thing.
• This commit prints the solution with roc run, prints nothing with roc dev and seg faults with roc test. The seg fault is fixed by this commit, so it seems to be from trying to use dbg on a struct containing a list of structs and a dict.

Last updated: Nov 28 2025 at 12:16 UTC