Regex question for matching

How to make a regex pattern that matches a character only when there’s another one? Just wondering.

Another one or at least one more?

Only when there’s another, different character.

Definition of your question has a lot of outcomes:

  • Do you want to match only one character or whole string only if there are 2+ characters?
  • What are you considering to be a character? Whitespace is a character also
  • If you want to match only one character, is it specific character or any character (would always be first one in the case of 2+ characters)

It might be that when you define your question precisely you will come up with the answer yourself.