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From: Eric Abrahamsen <eric@ericabrahamsen.net>
Newsgroups: gmane.emacs.gnus.general
Subject: Re: code query
Date: Wed, 26 Dec 2012 10:59:49 +0800
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Lars Ingebrigtsen <larsi@gnus.org> writes:

> Eric Abrahamsen <eric@ericabrahamsen.net> writes:
>
>> The problem with the below is that it seems to create one "pseudo article"
>> for each block of consecutive identical messages -- the pseudo article
>> is a new copy of that message, but can't be opened or displayed
>> properly, nor deleted. They're also persistent, so the more I run my
>> function the more "duplicate" messages I get!
>
> I don't quite understand that problem, but I'm surprised the code works
> at all.  :-)

Me too!

>>     (my-gnus-mark-duplicates gnus-newsgroup-data)
>
> [...]
>
>>   (let ((data (sort data (lambda (one two)
>
> This `sort' is destructive, so you're altering the `gnus-newsgroup-data'
> list (most likely truncating it).  Put a `copy-sequence' in there
> somewhere.

Thanks, I'll give that a shot.