Question

Can you be too old for trying to get good at programming? I don't want to be AWESOME but I want it to work somewhat decently. I'm 21 years old.

And I practically flunked 12th grade math. That's how bad I am.

Twenty three here
I googled regular expressions, and s/x/y doesn't mean anything special. In fact, the forward slash isn't a metacharacter, so saying s/x/y simply means to match "s/x/y"