Either I'm a regex wizard and don't know it, or perhaps I think I know something but know nothing at all but I've never complained about using regex expressions

Either I'm a regex wizard and don't know it, or perhaps I think I know something but know nothing at all but I've never complained about using regex expressions. I use them all the time without thought. Never quite figured out the need for a cheatsheet either, your language of choice should have a good documentation page for any specific supported syntax.