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regex - Notepad++ use both regular expressions and extended search

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


[^M]

I can only do with extended search selected or [^M] with regular expressions selected; but not together.

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You should instead use this regex:

R(?!M)

Explanation:

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

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