title: Learning J/K/APL
body: <p>I know all 3 are related, and I've seen quite a few answers for problems in <a href="http://projecteuler.net" rel="noreferrer" title="Project Euler">Project Euler</a> written in J, and a few written K. What I'm wondering is, which would you suggest learning, and where would you suggest going about getting the materials to learn it?</p>