2024 Day 16 Discussion Thread

[uncut hemlock]

Talk day 16 in here when it goes live! 1️⃣ 6️⃣ ☃️

[spring island]

I hated this one because of what is used.

[sacred bone]

I had it so quickly, but kept getting the function was returning N/A. Just re-ran it a few times and it went through.

[obtuse flume]

I can't seem to make this one work. Output keeps being N/A but console.logs show 5. Anyone found a solution?

[spring island]

||Two steps, first $ checks something ends with in Regex, and \ to escape something, like a full stop maybe?||

[obtuse flume]

I've also tried like that. It would look like this, no?

|| function countSnowReports(paths) {
const regex = //snow_report.txt$/;
const matches = paths.filter(file => regex.test(file));
console.log(matches.length)
return matches.length;
} ||

[spring island]

||In Regex you need to escape certain characters: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_escape||

[obtuse flume]

I don't know what's wrong anymore haha

||function countSnowReports(paths) {
const regex = //snow_report.txt$/;
const matches = paths.filter(file => regex.test(file));
return matches.length;
}||

[spring island]

||Ok, I'll give you one last hint to see if you can get it, reset the challenge, and you should see the use of character escaping, one more character needs escaping, and check it ends with this string. Give that a try, if not I can show you how I solved it.||

[obtuse flume]

I surrender 😦

[spring island]

||It's a two step fix, first we need to escape the dot \. and make sure we test that is ends with this string $.

/\/snow_report\.txt$/
```||

[obtuse flume]

Thank you!

🤔 I think I had that before. I'm trying it and it doesn't work:

||function countSnowReports(paths) {
// Regex to match only "snow_report.txt" at the end of any path
const regex = //snow_report.txt$/;

// Count how many files match the regex
const matches = paths.filter(file => regex.test(file));
return matches.length;

}||

Am I missing something?

[spring island]

||Yes, you're not espacing the slash (\/) and dot (\.) ||

[obtuse flume]

Sorry, that's when copy pasting

this is the code:

[spring island]

||That should be it yes||

[obtuse flume]

Found the problem!!! Thank you so much, @spring island
I was returning matches.length instead of matches

[sacred loom]

done! (before looking at this channel)

am I allowed to blame the yeti for thinking ||regexes are better than .endsWith()||?

[spring island]

||Aah, guess we both had blinders, I wasn't even paying attention to if you have changed the return value. 😂||

[spring island]

As much as I don't like ||regex, it does give you a wider array of things to test for than just .endsWith() for sure.||