I haven't posted in a while because I spent all of last week in Boston, MA, the latter half of which for the annual convention of the National Puzzlers' League . The convention was fun, and I'll make some time soon to tell you more about it and the other...

Every once in a while, I think I know exactly what the code that I'm writing is doing, and then I discover, often through some catastrophe, that I didn't quite understand all the details. One particularly instructive (or would that be destructive ?) example...