I'm the author. You don't exactly need the program to be small, you could do a lot with a small file (under 500 lines) being the only one able to access a globa

I'm the author. You don't exactly need the program to be small, you could do a lot with a small file (under 500 lines) being the only one able to access a global variable. People seem to think it's ok to leak data from your encapsulation when you're using a global which I tried to say is a bad idea in the article.