I've applied for front-end jobs and get asked some C.S. puzzle, to do something no front-end developer has ever needed to do (unless they wrote the one module e

I've applied for front-end jobs and get asked some C.S. puzzle, to do something no front-end developer has ever needed to do (unless they wrote the one module everybody else uses). And yet, it's not like I couldn't grok that if I needed to... just pay me and I'll figure it out, no problem. The difference between me and the applicants they are filtering, is that I can both learn and implement w/e algorithm, in any language you want. Want proof? Just look at all these other algorithms I learned and wrote.