I'm a CS graduate, and I read the Friedl book on regular expressions in high school. I don't seem to remember learning anything about automata from it, and I kn

I'm a CS graduate, and I read the Friedl book on regular expressions in high school. I don't seem to remember learning anything about automata from it, and I know for certain that my automata course in university didn't make me any more competent at understanding or applying regular expressions.