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From: Mathias Dahl <brakjoller.rem0veth1s@gmail.com>
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Subject: Re: Hiding lines based on a regexp
Date: Mon, 30 May 2005 09:11:05 +0200
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"David Vanderschel" <DJV4@Austin.RR.com> writes:

> Could someone please point me to a mechanism that would allow me to
> temporarily hide from display certain lines in a file based on a
> matching regular expression?  There is somewhat similar
> functionality with hide-ifdef-mode.  However, I want something less
> clever and more general.

Have you looked on EmacsWiki?

http://www.emacswiki.org/cgi-bin/wiki/HideLines

and

http://www.emacswiki.org/cgi-bin/wiki/CategoryHideStuff

/Mathias