xargs, shell instances, execution order and bash one-liners

I must confess that i have an addiction to writing one-liners. Probably a bad habit i picked from hanging around code-golfers. Afterall, i am lazy and i prefer a quick and dirty solutions. But that is only part of the appeal. Apart from serving as a great party trick, occasionally, one-liners made me ponder questions that i normally would not have considered.