Advent of Code (aka Language Shootout)

Bring in the Advent of Code season with a community language shootout! Participation with just two simple steps:

1. Solve some number of days of Advent of Code with your language of choice
2. Show up with your running solution(s)!

AoC difficulty ramps up beyond the first week, so the meetup is well-timed for anyone who's only passingly interested in the format.