advent-2021-kotlin VS advent-of-code

Once I finally understood how the examples worked with subpackets, I was able to come up with what I think is a nice clean solution. I ended up using an Iterator that got passed around to various sealed types that would parse themselves out. I defined several extension functions on Iterator to make things easier to read.

Kotlin -> [Blog/Commentary] - [Code] - [All 2021 Solutions]

JavaScript

Almost walked away from this when caught out by the "empty" space flipping. But stuck with it and managed to make it work without changing my approach too much.

I enjoyed this one, despite all the reading. Felt like a nice change of gear from yesterday's. Using recursion to read sub-packets from the binary string, using a function that returns the value (or version sum in part 1) as well as the length, so I know where to read from for the next sub-packet.

Enjoyed today's one, short and sweet

Mine is similar (but in JS)

Struggled to get my head around the explanation of part 2 today, need more coffee

not the most inspired solution

JS solutions, already settled back into the habit of relying on reduce functions

GitHub - Solutions to both halves