From: Drew Adams <drew.adams@oracle.com>
To: David Kastrup <dak@gnu.org>, Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Mark Oteiza <mvoteiza@udel.edu>,
Nicolas Petton <nicolas@petton.fr>,
emacs-devel@gnu.org
Subject: RE: seq-some-p and nil
Date: Tue, 8 Sep 2015 10:08:41 -0700 (PDT) [thread overview]
Message-ID: <3dc0f1d9-caf1-446a-ab14-2b3e210a02e7@default> (raw)
In-Reply-To: <87pp1s976u.fsf@fencepost.gnu.org>
> >> To make things easier to understand, I'm taking the example of finding
> >> the first odd number in a seq:
> >
> > I've never needed to do that.
>
> Marvelous.
;-)
Was there something wrong with the suggestion to return,
as the non-nil value, a cons (ELEMENT . VALUE)?
(Where ELEMENT is the sequence element that satisfies the
predicate, and VALUE is the return value of the predicate
for that element.)
That gives you "some" element that satisfies the predicate
(the first such). And it gives you the result of the test.
Each of these can be useful, depending on the context.
next prev parent reply other threads:[~2015-09-08 17:08 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-03 15:50 seq-some-p and nil Simen Heggestøyl
2015-09-03 16:42 ` Stefan Monnier
2015-09-03 17:19 ` Artur Malabarba
2015-09-03 17:35 ` John Mastro
2015-09-03 17:50 ` Drew Adams
2015-09-03 19:36 ` Nicolas Petton
2015-09-03 19:45 ` Nicolas Petton
2015-09-06 1:17 ` Mark Oteiza
2015-09-06 20:48 ` Nicolas Petton
2015-09-06 21:46 ` Stefan Monnier
2015-09-07 6:11 ` Nicolas Petton
2015-09-07 8:06 ` Drew Adams
2015-09-07 15:19 ` Stefan Monnier
2015-09-07 15:23 ` Mark Oteiza
2015-09-07 17:08 ` Drew Adams
2015-09-07 20:44 ` Nicolas Petton
2015-09-07 22:27 ` Stefan Monnier
2015-09-08 7:09 ` Nicolas Petton
2015-09-08 12:36 ` Stefan Monnier
2015-09-08 13:07 ` Nicolas Petton
2015-09-08 16:49 ` Stefan Monnier
2015-09-08 17:01 ` David Kastrup
2015-09-08 17:08 ` Drew Adams [this message]
2015-09-08 19:02 ` Nicolas Petton
2015-09-08 19:48 ` Drew Adams
2015-09-09 7:56 ` Nicolas Petton
2015-09-09 13:26 ` Drew Adams
2015-09-09 17:45 ` Stefan Monnier
2015-09-09 17:53 ` Drew Adams
2015-09-09 20:24 ` Stefan Monnier
2015-09-09 20:46 ` Drew Adams
2015-09-09 21:44 ` Nicolas Petton
2015-09-08 18:43 ` Stefan Monnier
2015-09-08 19:03 ` David Kastrup
2015-09-08 18:59 ` Nicolas Petton
2015-09-08 19:06 ` David Kastrup
2015-09-08 20:33 ` Stefan Monnier
2015-09-09 7:57 ` Nicolas Petton
2015-09-08 13:21 ` Nicolas Petton
2015-09-08 13:37 ` Mark Oteiza
2015-09-08 17:50 ` Stefan Monnier
2015-09-09 2:19 ` Mark Oteiza
2015-09-09 4:28 ` Stephen J. Turnbull
2015-09-09 4:57 ` Mark Oteiza
2015-09-07 20:45 ` Nicolas Petton
2015-09-03 19:40 ` Nicolas Petton
2015-09-10 17:46 ` Simen Heggestøyl
2015-09-10 22:12 ` Nicolas Petton
2015-09-22 17:17 ` Simen Heggestøyl
2015-09-23 8:38 ` Nicolas Petton
2015-09-23 8:44 ` David Kastrup
2015-09-23 8:48 ` Simen Heggestøyl
2015-09-23 10:57 ` Nicolas Petton
2015-09-28 19:17 ` Nicolas Petton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3dc0f1d9-caf1-446a-ab14-2b3e210a02e7@default \
--to=drew.adams@oracle.com \
--cc=dak@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=monnier@iro.umontreal.ca \
--cc=mvoteiza@udel.edu \
--cc=nicolas@petton.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).