Re: threading display strange

[Uwe Brauer <oub@mat.ucm.es>]

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>>> "TH" == Tassilo Horn <tsdh@gnu.org> writes:

> Uwe Brauer <oub@mat.ucm.es> writes:
> Hi Uwe,

>> I just realised that the following is odd:
>> 
>> []{ } 57606 [ Uwe Braue] Uwe Brauer [[CV] (was: [Amnu 19]) ] Sun, 28 Apr 2019
>> 11:30:41 +0200 8.8k 6
>> []{ }O 57585 [ tex-d-l-r] tex-d-l@li [tex-d-l Nachrichtenkompil] Sun, 28 Apr
>> 2019 00:00:07 +0200 13k 165
>> []{ }O 57593 [ users ] oub@mat.uc [Subject: Digest of users@] Sun, 28 Apr 2019
>> 08:00:27 +0000 (UTC) 38k 11
>> []{ } . 57604 [ Gestión d] oub@mat.uc [COMUNICADO AUTOMÁTICO DE ] Sun, 28 Apr
>> 2019 11:13:27 +0200 (CEST) 5.0k 32
>> []{ } 57608 [ Uwe Braue] Uwe Brauer [Re: [Amnu 19] ] Sun, 28 Apr 2019 11:31:33
>> +0200 11k ?
>> 
>> Why is  57606 displayed before  57585? 

> Well, since you didn't tell us how you've configured sorting, I assume
> you are using the defaults, and that would mean sorting by article
> number.

Sorry I posted my setting in a different message:

(setq gnus-thread-sort-functions
      '(gnus-thread-sort-by-date
        gnus-thread-sort-by-number))

(setq gnus-sort-functions
      '(gnus-article-sort-by-date
        gnus-article-sort-by-number))



> gnus-thread-sort-functions is a variable defined in ‘gnus-sum.el’.
> Its value is
> (...)
> Original value was 
> (gnus-thread-sort-by-number)

>   This variable may be risky if used as a file-local variable.

> Documentation:
> List of functions used for sorting threads in the summary buffer.
> By default, threads are sorted by article number.

> Each function takes two threads and returns non-nil if the first
> thread should be sorted before the other.  If you use more than one
> function, the primary sort function should be the last.  You should
> probably always include ‘gnus-thread-sort-by-number’ in the list of
> sorting functions -- preferably first.  Also note that sorting by date
> is often much slower than sorting by number, and the sorting order is
> very similar.  (Sorting by date means sorting by the time the message
> was sent, sorting by number means sorting by arrival time.)

> ...

> Especially, the last sentence might give a clue.  I think with NNTP
> (usegroups) the article number really exists on the server, so it's
> "time the message was received on that nntp server".  But with IMAP
> (mail) the number is assigned by Gnus, and then it basically gives the
> order in which you've downloaded the messages, and that's not really
> chronological.

Following your advice to read the documentation more carefully, I tried
the following setting

(setq gnus-thread-sort-functions
      '(gnus-thread-sort-by-number
        gnus-thread-sort-by-date))

(setq gnus-sort-functions
      '(gnus-article-sort-by-number
        gnus-article-sort-by-date))


However it does not help the summary buffer looks still
,----
| 
| []{ }O  57606 [  Uwe Braue] Uwe Brauer  [[CV] (was: [Amnu 19])    ] Sun, 28 Apr 2019 11:30:41 +0200 8.8k 6   
| []{ }OA     57609 [ +henar de ] Uwe Brauer  [                         ] Sun, 28 Apr 2019 09:35:45 +0000 10k 13   
| []{ }O  57621 [  Uwe Braue] Uwe Brauer  [[stuff] (was: [CV])      ] Sun, 28 Apr 2019 16:04:34 +0200 9.4k 16   
| []{ }O  57585 [  tex-d-l-r] tex-d-l@li  [tex-d-l Nachrichtenkompil] Sun, 28 Apr 2019 00:00:07 +0200 13k 165   
| []{ }O  57593 [  users    ] oub@mat.uc  [Subject: Digest of users@] Sun, 28 Apr 2019 08:00:27 +0000 (UTC) 38k 11   
| []{ }O  57604 [  Gestión d] oub@mat.uc  [COMUNICADO AUTOMÁTICO DE ] Sun, 28 Apr 2019 11:13:27 +0200 (CEST) 5.0k 32   
| 
`----

So how could I achieve the following 

,----
| []{ }O  57606 [  Uwe Braue] Uwe Brauer  [[CV] (was: [Amnu 19])    ] Sun, 28 Apr 2019 11:30:41 +0200 8.8k 6   
| []{ }OA     57609 [ +henar de ] Uwe Brauer  [                         ] Sun, 28 Apr 2019 09:35:45 +0000 10k 13   
| []{ }O  57585 [  tex-d-l-r] tex-d-l@li  [tex-d-l Nachrichtenkompil] Sun, 28 Apr 2019 00:00:07 +0200 13k 165   
| []{ }O  57593 [  users    ] oub@mat.uc  [Subject: Digest of users@] Sun, 28 Apr 2019 08:00:27 +0000 (UTC) 38k 11   
| []{ }O  57604 [  Gestión d] oub@mat.uc  [COMUNICADO AUTOMÁTICO DE ] Sun, 28 Apr 2019 11:13:27 +0200 (CEST) 5.0k 32   
| []{ }O  57621 [  Uwe Braue] Uwe Brauer  [[stuff] (was: [CV])      ] Sun, 28 Apr 2019 16:04:34 +0200 9.4k 16   
`----

???

Because I have had sometimes difficult in finding message, but the
ordering I mentioned. So I had to toggle threading off to find them.

The setting I would like to obtain would spare me that trouble.

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