Historically, an APL background was a good indication that you grok the apl/k/j/q mindset, which is very different from the Algol (c/c#/Java/pascal) world and a

Historically, an APL background was a good indication that you grok the apl/k/j/q mindset, which is very different from the Algol (c/c#/Java/pascal) world and also from the Lisp world.