Jiu-Jitsu is one of the more practical martial arts, since it's much closer to its street-fighting origins. Krav Maga stretches the definition of 'martial art'

Jiu-Jitsu is one of the more practical martial arts, since it's much closer to its street-fighting origins. Krav Maga stretches the definition of 'martial art' for some people, because of its focus on practicality, lack of formal competitions, and complete disregard for the safety of the person you're attacking. Jiu-Jitsu has the sometimes-useful property of generally being less-than-lethal, although the majority of the techniques have a high chance of causing lasting, sometimes permanent, damage. In terms of relations to programming: Krav Maga has a heavy focus on edge cases, and a "good enough" philosophy. Jiu-Jitsu focuses on perfecting a smaller number of core cases.