iset-search implementations Wolfgang Corcoran-Mathe (08 Dec 2020 20:01 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (08 Dec 2020 20:18 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (09 Dec 2020 18:07 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (10 Dec 2020 12:00 UTC)
Re: iset-search implementations Arthur A. Gleckler (10 Dec 2020 16:40 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (10 Dec 2020 16:50 UTC)
Re: iset-search implementations Arthur A. Gleckler (10 Dec 2020 16:52 UTC)
Re: iset-search implementations John Cowan (11 Dec 2020 02:24 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (11 Dec 2020 02:47 UTC)
Re: iset-search implementations John Cowan (11 Dec 2020 03:05 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (11 Dec 2020 18:41 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (12 Dec 2020 10:59 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (14 Dec 2020 17:44 UTC)
Re: iset-search implementations John Cowan (16 Dec 2020 15:34 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (16 Dec 2020 15:42 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (31 Dec 2020 18:23 UTC)
Re: iset-search implementations John Cowan (07 Jan 2021 21:42 UTC)
Re: iset-search implementations Arthur A. Gleckler (08 Jan 2021 04:40 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (08 Jan 2021 13:32 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (08 Jan 2021 23:47 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (09 Jan 2021 13:28 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (10 Jan 2021 23:35 UTC)
Re: iset-search implementations Arthur A. Gleckler (11 Jan 2021 00:05 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (11 Jan 2021 06:33 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (11 Jan 2021 00:28 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (12 Jan 2021 14:34 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (12 Jan 2021 18:55 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (18 Jan 2021 09:13 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (19 Jan 2021 18:54 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (20 Jan 2021 10:53 UTC)
Re: iset-search implementations Wolfgang Corcoran-Mathe (21 Jan 2021 20:31 UTC)
Re: iset-search implementations Marc Nieper-Wißkirchen (11 Dec 2020 08:40 UTC)

Re: iset-search implementations Wolfgang Corcoran-Mathe 11 Dec 2020 18:41 UTC

On 2020-12-10 22:04 -0500, John Cowan wrote:
> On Thu, Dec 10, 2020 at 9:47 PM Wolfgang Corcoran-Mathe <xxxxxx@sigwinch.xyz>
> wrote:
>
> That's fine.  If `search' is set by convention, then this is, indeed,
> > an implementation issue.  I may have to fall back to the two-pass
> > search-then-adjoin approach, since I doubt there's a better way.
> >
>
> If the value searched for is the same (in the sense of eqv?) as the
> new-value passed to the update continuation, don't do anything: this case
> arises in "do nothing if the element is already present" cases.  If it is
> different, do a delete and an insert.  I can't see anything better than
> that.

Done.

> I haven't looked at the implementation: would it be more efficient to see
> whether the insert or the delete comes first, and then do the processing in
> that order?

There might be minor differences in efficiency in some cases, but the
asymptotic complexity of insert ∘ delete is the same as that of
delete ∘ insert.  So we'll stick with the former order for now.

--
Wolfgang Corcoran-Mathe  <xxxxxx@sigwinch.xyz>

"A picture is worth 10k words--but only those to describe the picture.
Hardly any sets of 10k words can be adequately described with pictures."
--Alan J. Perlis