Yes, the questions are now gone, but the person who replied went through the trouble of linking the questions in the first place so we didn't have to take their word for it.

You can even read the questions from the URLs: "/meaning-of-dollar-sign-after-digit-and-dash-in-a-regex" C'mon.

This is a common trope with people complaining about SO, so it's not surprising they had terrible questions. Nobody likes to admit when their questions are bad.