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From: Lars Magne Ingebrigtsen <larsi@gnus.org>
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Subject: Re: different thread sorting?
Date: 07 Nov 1998 15:10:34 +0100
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Kai.Grossjohann@CS.Uni-Dortmund.DE writes:

> Current behavior:
> Thread A is sorted before thread B if the OLDEST article in A is older
> than the OLDEST article in B.

That's almost right -- the threads are sorted on the thread root.
This is the oldest article in most cases, but in some weird cases,
it's not.

> Desired behavior:
> Thread A is sorted before thread B if the NEWEST article in A is older
> than the NEWEST article in B.
> 
> Of course, this behavior should be optional.
> 
> What has become of this issue? 

I haven't done anything about it.  Implementing it shouldn't be too
difficult, I think -- one should write a function that descends the
thread tree and returns the header of the newest article, and then just
sort the threads using a function that would look like:

(defun gnus-thread-sort-by-newest-date (h1 h2)
  "Sort threads by root article date."
  (gnus-article-sort-by-date
   (gnus-newest-article-in-thread h1) (gnus-newest-article-in-thread h2)))

Writing `gnus-newest-article-in-thread' is left as an exercise for the
reader. 

-- 
(domestic pets only, the antidote for overdose, milk.)
  larsi@gnus.org * Lars Magne Ingebrigtsen