Earlier today I wrote a ruby script to go through a JavaScript file, find all ocurrences where a method was written in a certain way, and convert it to a new format.
I realized before writing it that there I would never use this script after today, no one ever had to see it, and it would never get version controlled. So i just wrote it in the quickest "get it functional for 95% of cases and throw an error otherwise"
It was kind of fun. Multiple parts had godawful big-O run times, multiple anti patterns, etc. But none of that mattered since it would never be used on a massive file and would never be in production. It took me back to that phase where i was young and doing pet projects and i could be as selfish as possible.