From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail
From: Michael Heerdegen <michael_heerdegen@web.de>
Newsgroups: gmane.emacs.help
Subject: Re: Closures - do you understand them well?
Date: Fri, 09 Dec 2022 17:55:00 +0100
Message-ID: <87zgbwms9n.fsf@web.de>
References: <87lenh7vrn.fsf@web.de> <87tu25d77o.fsf@gnu.org>
 <87h6y5pt8k.fsf@web.de> <jwvbkodbrao.fsf-monnier+emacs@gnu.org>
 <87bkodpqnk.fsf@web.de> <87y1rhckdm.fsf@dataswamp.org>
 <87a63xns30.fsf@web.de> <Y5K710Bwjc6iIjLL@tuxteam.de>
 <87r0x9cf42.fsf@dataswamp.org>
Mime-Version: 1.0
Content-Type: text/plain
Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214";
	logging-data="28718"; mail-complaints-to="usenet@ciao.gmane.io"
User-Agent: Gnus/5.13 (Gnus v5.13)
To: help-gnu-emacs@gnu.org
Cancel-Lock: sha1:Xms39I9RV/rQQOPDq7Eu2Qqcm88=
Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Dec 09 17:55:53 2022
Return-path: <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org>
Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org
Original-Received: from lists.gnu.org ([209.51.188.17])
	by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org>)
	id 1p3gfB-0007Ed-OE
	for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 09 Dec 2022 17:55:53 +0100
Original-Received: from localhost ([::1] helo=lists1p.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.90_1)
	(envelope-from <help-gnu-emacs-bounces@gnu.org>)
	id 1p3gea-0006sM-BJ; Fri, 09 Dec 2022 11:55:16 -0500
Original-Received: from eggs.gnu.org ([2001:470:142:3::10])
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <geh-help-gnu-emacs@m.gmane-mx.org>)
 id 1p3geX-0006rk-Fg
 for help-gnu-emacs@gnu.org; Fri, 09 Dec 2022 11:55:13 -0500
Original-Received: from ciao.gmane.io ([116.202.254.214])
 by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <geh-help-gnu-emacs@m.gmane-mx.org>)
 id 1p3geU-0000bz-NP
 for help-gnu-emacs@gnu.org; Fri, 09 Dec 2022 11:55:12 -0500
Original-Received: from list by ciao.gmane.io with local (Exim 4.92)
 (envelope-from <geh-help-gnu-emacs@m.gmane-mx.org>)
 id 1p3geS-0006OB-24
 for help-gnu-emacs@gnu.org; Fri, 09 Dec 2022 17:55:08 +0100
X-Injected-Via-Gmane: http://gmane.org/
Received-SPF: pass client-ip=116.202.254.214;
 envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io
X-Spam_score_int: -13
X-Spam_score: -1.4
X-Spam_bar: -
X-Spam_report: (-1.4 / 5.0 requ) BAYES_00=-1.9,
 FREEMAIL_FORGED_FROMDOMAIN=0.248, FREEMAIL_FROM=0.001,
 HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001,
 SPF_PASS=-0.001 autolearn=no autolearn_force=no
X-Spam_action: no action
X-BeenThere: help-gnu-emacs@gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Users list for the GNU Emacs text editor <help-gnu-emacs.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/help-gnu-emacs>,
 <mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/help-gnu-emacs>
List-Post: <mailto:help-gnu-emacs@gnu.org>
List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
 <mailto:help-gnu-emacs-request@gnu.org?subject=subscribe>
Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org
Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org
Xref: news.gmane.io gmane.emacs.help:141515
Archived-At: <http://permalink.gmane.org/gmane.emacs.help/141515>

Emanuel Berg <incal@dataswamp.org> writes:

> This is why you should never quote lambdas because if you do,
> you get the intuitive result:
>
> (let ((i 0)
>       (funs '()))
>   (while (< (setq i (1+ i))
>             4)
>     (push `(lambda () ,i)
>           funs))
>   (apply #'+ (mapcar #'funcall funs))) ; 6

I think the intended goal was to see that shortcuts can cause trouble,
not to try to find a better shortcut...

Michael.