A modern programming language that makes developers happier.

kotlinlang

<https://github.com/edgars-supe/advent-of-code/blob/master/src/main/kotlin/lv/esupe/aoc/year2019/Day8.kt>
Couldn't think of a way to optimize this more. But I'm glad it took me less time for both parts than it did to get a permutation generator working yesterday... (and I still haven't done part 2)

Going char by char (`(0 until 25*6)`) and taking the first non-`2` from the layers works twice as fast, give or take, but isn't all that readable.

Oh wow, didn't know about `asString`, very neat. You could replace `fold` with `joinStoString` I think.

`asString()` is an extension I wrote. :slightly_smiling_face:
```fun List&lt;Char&gt;.asString(): String = joinToString(separator = "")```


Hmm, `joinToString()` isn't any faster, but more readable, I'd say. :slightly_smiling_face:

Yeah no it should be about the same since it just uses the same stringbuilder inside.