From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#34842: 26.1; Alist documentation: let-alist Date: Sun, 13 Oct 2019 01:32:04 +0200 Message-ID: <87eezhh763.fsf@gnus.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="11819"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: 34842@debbugs.gnu.org To: =?UTF-8?Q?Sebasti=C3=A1n_?= =?UTF-8?Q?Mon=C3=ADa?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Oct 13 01:33:10 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iJQso-0002wK-0m for geb-bug-gnu-emacs@m.gmane.org; Sun, 13 Oct 2019 01:33:10 +0200 Original-Received: from localhost ([::1]:36576 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iJQsm-0005RU-TB for geb-bug-gnu-emacs@m.gmane.org; Sat, 12 Oct 2019 19:33:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46275) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iJQsh-0005Qm-4S for bug-gnu-emacs@gnu.org; Sat, 12 Oct 2019 19:33:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iJQsf-000222-UF for bug-gnu-emacs@gnu.org; Sat, 12 Oct 2019 19:33:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:53898) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iJQsf-00021q-RK for bug-gnu-emacs@gnu.org; Sat, 12 Oct 2019 19:33:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iJQsf-0007xM-MY for bug-gnu-emacs@gnu.org; Sat, 12 Oct 2019 19:33:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 12 Oct 2019 23:33:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 34842 X-GNU-PR-Package: emacs Original-Received: via spool by 34842-submit@debbugs.gnu.org id=B34842.157092313230506 (code B ref 34842); Sat, 12 Oct 2019 23:33:01 +0000 Original-Received: (at 34842) by debbugs.gnu.org; 12 Oct 2019 23:32:12 +0000 Original-Received: from localhost ([127.0.0.1]:34483 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iJQrr-0007vy-K7 for submit@debbugs.gnu.org; Sat, 12 Oct 2019 19:32:11 -0400 Original-Received: from quimby.gnus.org ([80.91.231.51]:42682) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iJQrp-0007vl-E3 for 34842@debbugs.gnu.org; Sat, 12 Oct 2019 19:32:09 -0400 Original-Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=marnie) by quimby.gnus.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iJQrl-0001RA-7U; Sun, 13 Oct 2019 01:32:07 +0200 In-Reply-To: ("=?UTF-8?Q?Sebasti=C3=A1n_?= =?UTF-8?Q?Mon=C3=ADa?="'s message of "Wed, 13 Mar 2019 14:16:15 +0000") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:169074 Archived-At: Sebasti=C3=A1n Mon=C3=ADa writes: > The macro let-alist is too useful to work with JSON-parsed data for it to= be > missing from the docs. > > In the page > https://www.gnu.org/software/emacs/manual/html_node/elisp/Association-Lis= ts.html > we should add some documentation about it. Below a suggestion. > > Thank you! > > =E2=80=94 Macro: let-alist `value` > Creates a binding for each symbol in the association list `value`, prefix= ed with > dot. This is very useful when accessing several items in the same alist, = and it's > best understood through a simple example: > > (setq colors '((rose red) (lily white) (buttercup yellow))) > (let-alist colors > (print .rose) > (print .buttercup)) > =E2=87=92 red > =E2=87=92 yellow Even though I question the usefulness of this macro (especially since it doesn't nest well, so it seems just kinda ad-hoc), I've now documented it along the lines you suggest. Drew wanted the manual to describe more fully the actual details behind the implementation, but I think that doesn't add much clarity. --=20 (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no