Advent of code
from https://adventofcode.com/about :
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.
You’ll find here my solutions (In COS) for Advent Of Code puzzles.
The code is written in Cache Object Script (from Intersystems)
You can learn more here: https://cedocs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=GOBJ