That's a really badass trick when you look at how it is implemented. Another cool thing to look at is Obverse. https://code.jsoftware.com/wiki/Vocabulary/Invers

That's a really badass trick when you look at how it is implemented. Another cool thing to look at is Obverse. https://code.jsoftware.com/wiki/Vocabulary/Inverses https://code.jsoftware.com/wiki/Vocabulary/Inverses There's a lot of material on their website, though it's not well organized and some of it is out of date. https://code.jsoftware.com/wiki/Main_Page https://code.jsoftware.com/wiki/Main_Page I find it rewarding to screw around with, though the only jobs you're gonna get are K/Kx related.