Advent of Code - Day 13

I found today’s task somewhat tedious. I lost some time because I didn’t cover the case where the cars crash in the middle of the tick, so I got wrong results. Anyway, my solution is here.

I need to do some serious refactoring and tidying up and I’ve only completed part 1 so far but my solution is here.

Part 2 should be pretty simple to solve but my guess about it involving tracking the number of ticks was wrong so I can also tidy my code up because of that a bit too.

My biggest gotcha was in that I copied and pasted my file reading code from a previous day and was trimming it so my grid was all out of alignment.

I’ll add the part two solution tomorrow morning.

My solution to Day 13:

https://github.com/JEG2/advent_of_code_2018/blob/master/day_13/mine_cart_madness.exs

You can watch me create it in this video (for the next 14 days):

My solution to Day 13. I struggled with collision detection for a long time. Here is the cleaned up version of my code.

I struggled with this one. It was also a pain in the ass to debug what was wrong with the state I was building at each tick. I wish they gave more test cases to cover rather than the default one as that one was passing.

My solution is here.

Laborious but interesting!

https://github.com/snewcomer/advent-of-code-elixir/blob/master/day13/lib/day13.ex

It wasn’t and I ended up also retro-fitting the part 2 solution to handle part 1 too. However the updated code can all be found here.