Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as a speed contest, interview prep, company training, university coursework, practice problems, or to challenge each other.
oneeyedman/advent-of-code-2018
This is what cools looks like nowadays, it is like an #inktober for non-artists (L)
JavaScript