Re: regular expression for hiding comment

[Anselm Helbig]

Hi!

> I need a regexp which show all line execpt lines which include the
> string "--" (the qoute is not part of the sign).

Generally, RegExps suck at "negative matching". You'd rather have a
regexp match all lines that are comments and then do something to the
other lines. There's M-x flush-lines for example, and M-x grep calls
out to the external grep program that has the `-v'-switch. 

It might be possible to construct a regex that does what you want.
Unfortunately, this isn't so easy and Peter's solution is definitely
wrong - it matches any line that contains two adjacent non-dash
characters.  I don't have a quick answer to that one neither - nice
brain teaser. 8-)

HTH, 

Anselm


-- 
Anselm Helbig 
mailto:anselm.helbig+news2009@googlemail.com