kotlinlang #advent-of-code

kinda surprised so many people say the regex was the most natural, anytime a problem is trivially solvable using string split I'd always consider that the easiest solution

👆 1

asad.awadia

12/02/2020, 4:01 PM

regex is the git of string manipulation

Nir

12/02/2020, 4:26 PM

🤷 prefer the principle of least power. I also prefer to avoid regex for code whose performance I may care about; i guess right now the AOC challenges are very small anyway but it won't stay that way

Nir

12/02/2020, 5:04 PM

In the python slack, they setup a thread for people to post their solutions (they actually have multiple threads, part1 and part2, and potentially a third thread for people who want to post both together), could have something like that here

➕ 1

Nir

12/02/2020, 5:24 PM

⚠️ Day 2 Solution Thread - here be spoilers ⚠️

Jérôme Gully

12/02/2020, 6:22 PM

Day2 solution here: https://github.com/Nutriz/AdventOfCode2020/blob/master/src/test/kotlin/Day2.kt This year I try to use the Unit Test approach, I never really used it. But it's a lot of code compared to yours solutions 🙃. Solution code after all tests.

👌 1

bjonnh

12/03/2020, 3:00 AM

I'm playing with the advent from 2015 ((I never did one before).

Jakub Gwóźdź

12/03/2020, 8:25 AM

⚠️ Day 3 Solution Thread - here be spoilers ⚠️

Nir

12/03/2020, 3:35 PM

It's not really a matrix of strings, is it?

bjonnh

12/03/2020, 3:36 PM

yes

adamratzman

12/04/2020, 4:58 AM

⚠️ Day 4 Solution Thread - here be spoilers ⚠️

David Whittaker

12/04/2020, 5:25 AM

That was crazy - but gotta love me that

when

statement!!

😂 1

David Whittaker

12/04/2020, 5:32 AM

I messed up the first part since my logic didn't include the last line (it calc'd on a newline) so I had an off-by-one error. So I just added an arbitrary newline to the file. 😎

adamratzman

12/04/2020, 5:33 AM

You just have to split the input by \n\n, and split each of those by space or newline

adamratzman

12/04/2020, 5:36 AM

As well as range checks with chars

💯 2

todd.ginsberg

12/04/2020, 3:18 PM

I did mine entirely with regular expressions.

Nir

12/04/2020, 3:37 PM

Today's AOC inspired idea for a utility function:

Copy code

fun String.popSuffix(suffix: String) = if (endsWith(suffix)) removeSuffix(suffix) else null

adamratzman

12/04/2020, 3:57 PM

I was also thinking extension function String.isInt

Nir

12/04/2020, 4:29 PM

They can't really have things like ':' in the string without additional conditional constraints

pavi2410

12/04/2020, 6:05 PM

Any idea why the output is 1? (The output is definitely not 1; it's 267 or so) Is it an issue with

*.ws.kts

files? Any limitations I'm not aware of?

Edgars

12/04/2020, 6:52 PM

What did you guys do with regards to parsing multiple lines as one passport, what with the blank line?

bjonnh

12/04/2020, 6:53 PM

(please try to keep the discussions in the thread to not spoil)

adamratzman

12/04/2020, 7:19 PM

I wrote a

List<T>.chunkedBy

function that some people might find useful

adamratzman

12/04/2020, 7:20 PM

Example (contains spoilers)

adamratzman

12/05/2020, 4:26 AM

⚠️ Day 5 Solution Thread ⚠️

David Whittaker

12/05/2020, 5:41 AM

What in the world do you think this is going to be?

🤷‍♂️ 2

adamratzman

12/06/2020, 4:51 AM

⚠️ Day 6 Solution Thread ⚠️

bjonnh

12/06/2020, 4:57 AM

🕙

Kroppeb

12/06/2020, 5:12 AM

I accidentally misread part 1 and solved part 2 instead. Which makes part 2 more hillarious

😂 4

Kroppeb

12/06/2020, 5:20 AM

I didn't expect there to be another puzzle where we had to split on emptylines agian. I guess I should have made that

SplitOn{}

I was thinking about