I once knew a guy who derived great pride from writing clever code...
All variable names were reduced to single characters because "long variable names slow me down".
Log messages were cryptic things like "a < 5" which required you to know why that mattered.
Zero comments. Zero READMEs. When I asked for documentation, he said "well just look in the main function and follow it from there".
He was absolutely wizard-speed at debugging his work... but literally no one else could help. I once had to fix a problem while he was on vacation - it took me 6 hours to decipher the messages so I could fix a 5-minute problem.
