Also related to AoC earlier - does Kotlin have any...

# getting-started

[adam-mcneilly]

Also related to AoC earlier - does Kotlin have any circular linked list data type or would I just use any Java implementation that I've previously had? My instincts tell me no since most Kotlin collections are based upon the Java ones.

[karelpeeters]

I just appended the first element to the end of the list and used zipWithNext on it.

[karelpeeters]

Ugly but elegant 😛.

[karelpeeters]

But no, I don't think this exists in the Kotlin stdlib.

[adam-mcneilly]

LOOOOL I DID THIS TOO. It's not so helpful for the second part, though.

[karelpeeters]

What second part?

[stkent]

reminder that there's also windowed now

[stkent]

also not that helpful for part ii though

[adam-mcneilly]

There's two parts to every AoC problem.

[karelpeeters]

I only noticed the "sum of matching digits one" and got my golden star, what's the other one?

[karelpeeters]

@stkent zipWithNext is also new in 1.2.

[adam-mcneilly]

It's the same idea, but it's a circular list that wraps all the way around, so you might need to go beyond the "first" digit so it's not enough to just append it again.

[adam-mcneilly]

That explains why I never heard of it.

[karelpeeters]

I'll check it out later. You can emulate circular lists with list[index % list.size] if that helps.

[adam-mcneilly]

That's what I've been told. I need to sit down and try that.