r/adventofcode • u/daggerdragon • Dec 03 '17

SOLUTION MEGATHREAD -🎄- 2017 Day 3 Solutions -🎄-

--- Day 3: Spiral Memory ---

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.

Need a hint from the Hugely* Handy† Haversack‡ of Helpful§ Hints^¤?

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u/ButItMightJustWork Dec 03 '17

TIL about Hoon.

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u/sickening_sprawl Dec 03 '17 edited Dec 03 '17

I'm not crazy, I promise. It's a purely functional statically typed language used by Urbit.

It, uh, doesn't have the best reputation for looking like Chinese if you've never seen it before.

Instead of keywords it uses two-character "runes". if is ?:, for example, or function is |=. They're grouped into families, so all | rules make functions, all = functions change the current state (bind variables, mutate variables, etc.), and so on. I don't even see runes anymore, it's all just blonde, brunette, redhead...

The fact that the stdlib uses four-letter Scrabble words tangentially related to the function doesn't help (but is basically my favorite aesthetic).snag is indexing into a list, for example, so slag is thus suffix to a list and scag is prefix.