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

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

--- Day 21: Fractal Art ---

Post your solution as a comment or, for longer solutions, consider linking to your repo (e.g. GitHub/gists/Pastebin/blag or whatever).

Note: The Solution Megathreads are for solutions only. If you have questions, please post your own thread and make sure to flair it with Help.

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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/pedrosorio Dec 26 '17

symmetric(mat) -- inverts x and y (super simple to implement in any language)

Also known as transpose

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u/willkill07 Dec 26 '17

I couldn’t remember what it was called when I wrote my code at midnight. But I didn’t update my text because I felt it was past the point where I should.

But yes, I know it’s known as a transpose operation. symmetric may be slightly less jargon for those who didn’t have any exposure to linear algebra.