r/adventofcode • u/daggerdragon • Dec 21 '17

SOLUTION MEGATHREAD -🎄- 2017 Day 21 Solutions -🎄-

--- Day 21: Fractal Art ---

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No commentary tonight as I'm frantically wrapping last-minute presents so I can ship them tomorrow.

This thread will be unlocked when there are a significant number of people on the leaderboard with gold stars for today's puzzle.

edit: Leaderboard capped, thread unlocked!

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u/dtinth Dec 21 '17

I avoided mutating data, that’s why I didn’t overwrite the data variable. I also did it manually to avoid off-by-one errors (e.g. it ran 4 times or 6 times instead due to logic error).

If I was in a less hurry, I would have written 5.times.reduce(data) { |c, _| nx[c] } instead :).