Is anyone familiar with Bitwig? It's a pretty good DAW and you can write your own controller scripts in JS. I bought two controllers (Launchpad Mini and Launch Control), one of which has a really outdated factory script and the other one doesn't have anything, so I decided to update the existing one and port it over to the other controller. They do similar stuff.

I started going through the code and I think it gave me cancer. It has many gems, but so far this is my favourite. The second is a function that takes two parameters and returns false.