K Fragments
So this:<p>&gt; {.+(k;({x@&amp;~_n~&#x2F;:x}x@&#x27;)&#x27;k:?,&#x2F;!:&#x27;x)}<p>Turns a list of dictionaries to a dictionary of lists. It is clearly amazingly expressive as you can do so much in just half a line of code.<p>However, for someone not used to APL, this is utterly and totally unreadable. I can pick pretty much any ML derivative, C-style or lisp language and make heads and tails of most code, but with the above line I don&#x27;t even know where to start. Might as well be hieroglyphs :)