I've done AoC using my own language before. As a task it's at a sweet spot for finding weaknesses in the language/library/implementation: real and varied enough

I've done AoC using my own language before. As a task it's at a sweet spot for finding weaknesses in the language/library/implementation: real and varied enough to exercise your system, small chunks of work, lots of code to compare yours to, with fun and competitive juices. The first time I did it it forced me to fix some major problems. My language would still be a handicap for me now, albeit a comfy one. fwiw: https://github.com/darius/cant/tree/master/examples/advent-of-code https://github.com/darius/cant/tree/master/examples/advent-o... (haven't done this year's so far)