Also check out:
- Arthur Whitney's in k9: http://nsl.com/k9/AOC.k
- ngn's in ngn/k: https://bitbucket.org/ngn/k/src/master/a20/a.k
- Mark Street's in q: https://github.com/mkst/aoc/tree/master/2020
- András Dőtsch's in q: https://github.com/adotsch/aoc
- Jay Foad's in Dyalog APL: https://github.com/jayfoad/aoc2020apl
- pindash's in q/k9: https://github.com/pindash/adventQ/blob/master/2020.q
- copy's in ngn/k: http://copy.sh/kaoc20/
- RvG's in k9: https://git.sr.ht/~rvg/adventofk/tree/master/item/2020
Useful k resources:
- John Earnest's docs (k6)
- John Estrada's docs (k9)
- Antonio's folds guide (k9)
- k code tweets (mostly k9)
Reddit solution megathreads: