Attachments: 2007/01/ndfa.pdf Download the source: Example 1. Sad to say, but my holidays are over, and I’m back to work. I tried pretty hard to keep my hands away from the laptop while I was off, but I got itchy fingers towards the end so I had a stab at implementing a non-deterministic finite automaton (NDFA). I implemented it to give me an excuse to play with the C5 collections library.