Convert first lowercase to uppercase and uppercase to lowercase (regex?)
问题 I have a huge file in this layout: world12345:Betaalpha world12344:alphabeta world12343:ZetaBeta world12342:!betatheta I need to convert the first lowercase letter after the ":" to uppercase and the first uppercase letter to lowercase. I've tried using notepad++ and emeditor, but I'm not that experienced with regex. This is how I want it to become after (regex?) world12345:betaalpha world12344:Alphabeta world12343:zetaBeta world12342:!betatheta (unchanged, as the first char is a special char)