Thank you very much for your kind words nick! A bit of bragging, I am also quite proud to have a black belt in karate (Shotokan, 1st Dan). Currently I am doing native development (iOS with Swift) at work and I really love it! As a JavaScript developer Swift feels very familiar (and you don't suffer from the current JavaScript fatigue ;-)
Cool on the Black belt. I did Shotakan, too. I stopped just before Brown since I discovered Bruce Lee's teachings along with Ninjutsu & military styles. Pivoted into those to learn different things. I keep recommending martial arts to people in general sense the mental agility, toughnes, & determination pays off in other areas.
Including I think in programming when trying to solve problems or especially debugging failures that lead others' libraries you just had to use.