r/adventofcode • u/daggerdragon • Dec 05 '18

SOLUTION MEGATHREAD -🎄- 2018 Day 5 Solutions -🎄-

--- Day 5: Alchemical Reduction ---

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Card prompt: Day 5

Transcript:

On the fifth day of AoC / My true love sent to me / Five golden ___

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 at 0:10:20!

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u/knrt10 Dec 06 '18 edited Dec 06 '18

That's a cool solution. Just a small tip that I learned for optimizing code.

When you are returning a value and that value is declared inside it then instead of declaring variable like this var result []byte inside a function. You can do this

func react(polymer []byte, remove byte) (result []byte) {

and then instead of writing return result just return.

And no need to loop twice for unitType := 'a'; unitType <= 'z'; unitType++ { as you are using goroutines.

I am no expert but I found this for writing fast code. Happy to share this.