Delete all lines (not) matching a regex using Notepad++

Question

How to delete all lines matching or not matching a regex in Notepad++?

In Vim, I\'d do the following to delete all matching lines:

:g/regex/d
         


        

Answer 1

In the Find dialog, on the Mark tab, you can bookmark lines that match... Then on the menu Search > Bookmark > Remove Unmarked Lines or Remove Bookmarked lines