Find lines not starting with " in Notepad++

Question

I try to verify a CSV file where we had problems with line breaks.

I want to find all lines not starting with a \".

I am trying with /!^\"

Answer 1

In Notepad++ you can use the very usefull negative lookahead

In your case you can try the following:

^(?!")

If you want to match wholes lines add .+ or .{1,7} or anything e.g.:

^(?!").*

will also match empty lines.

Explanation part

^ line start

(?!regexp) negative lookahead part: this means that if the regexp match, the result will not be shown