This code doesn't compile probably because of add proc not defined for CountTable. I've corrected it and now it works. I hope this is what you wanted to show.
Thanks for reporting. Indeed I wrote most of the book directly from content of my head. I tested some larger code examples, but generally not the tiny ones. Will fix that soon.
This code doesn't compile probably because of add proc not defined for CountTable. I've corrected it and now it works. I hope this is what you wanted to show.