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* Is it ok to sort a list of overlays destructively?
@ 2021-07-27  5:22 Marcin Borkowski
  2021-07-27  9:40 ` tomas
  2021-07-27 13:49 ` Eli Zaretskii
  0 siblings, 2 replies; 15+ messages in thread
From: Marcin Borkowski @ 2021-07-27  5:22 UTC (permalink / raw)
  To: Help Gnu Emacs mailing list

Hi all,

I need to sort the list of overlays returned by `overlays-in'.  The docs
for that function do not says explicitly that it creates a new list
every time, although a cursory glance at its source says that it
apparently does.  (Also,

(eq (overlays-in (point-min) (point-max)) (overlays-in (point-min) (point-max)))

is nil also when there are overlays in the buffer, so it seems to be the
case.)  OTOH, if creating a new list every time isn't in the docs, one
shouldn't rely on it, no?

So, is it a good practice to

(sort (overlays-in (point-min) (point-max))
      (lambda (o1 o2)
	(< (overlay-start o1) (overlay-start o2))))

?

TIA,

-- 
Marcin Borkowski
http://mbork.pl



^ permalink raw reply	[flat|nested] 15+ messages in thread

end of thread, other threads:[~2021-07-30 19:27 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-07-27  5:22 Is it ok to sort a list of overlays destructively? Marcin Borkowski
2021-07-27  9:40 ` tomas
2021-07-27 10:07   ` Marcin Borkowski
2021-07-27 13:49 ` Eli Zaretskii
2021-07-27 20:14   ` Marcin Borkowski
2021-07-28  2:25     ` Eli Zaretskii
2021-07-28  6:06       ` Marcin Borkowski
2021-07-28 11:44         ` Eli Zaretskii
2021-07-29 11:34           ` John Yates
2021-07-29 12:33             ` Eli Zaretskii
2021-07-29 15:11               ` 2QdxY4RzWzUUiLuE
2021-07-29 15:30                 ` Eli Zaretskii
2021-07-29 16:20                   ` 2QdxY4RzWzUUiLuE
2021-07-29 16:53                     ` Eli Zaretskii
2021-07-30 19:27               ` Marcin Borkowski

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