Notepad++ use both regular expressions and extended search

Question

I need to find all \\r\\n that do not precede the letter M;
Seems I can\'t do this:

\\r\\n[^M]

I can only do \\r\\n<

Answer 1

You should instead use this regex:

\R(?!M)

Explanation:

• \R Any Unicode newline sequence.
• (?!M) Negative Lookahead: Assert "M" cannot be matched.