From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Drew Adams Newsgroups: gmane.emacs.bugs Subject: bug#24014: 24.5; doc string of `cl-reduce' Date: Mon, 18 Jul 2016 07:02:30 -0700 (PDT) Message-ID: <791de973-6bb2-4bd3-a375-b6866e594ad2@default> References: <18e97f8d-f6f8-4b4c-9d4c-20eb8664483e@default> <87zipgmf51.fsf@web.de> <578C993D.10507@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1468850822 2202 80.91.229.3 (18 Jul 2016 14:07:02 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 18 Jul 2016 14:07:02 +0000 (UTC) To: =?UTF-8?Q?Cl=C3=A9ment?= Pit--Claudel , 24014@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Jul 18 16:06:48 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bP9C4-0006Ud-4Z for geb-bug-gnu-emacs@m.gmane.org; Mon, 18 Jul 2016 16:06:48 +0200 Original-Received: from localhost ([::1]:47606 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bP9C3-00033E-D1 for geb-bug-gnu-emacs@m.gmane.org; Mon, 18 Jul 2016 10:06:47 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42733) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bP98U-0006nY-1R for bug-gnu-emacs@gnu.org; Mon, 18 Jul 2016 10:03:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bP98Q-0007FR-1c for bug-gnu-emacs@gnu.org; Mon, 18 Jul 2016 10:03:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:43511) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bP98P-0007FH-Uv for bug-gnu-emacs@gnu.org; Mon, 18 Jul 2016 10:03:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bP98P-0007Fy-Mp for bug-gnu-emacs@gnu.org; Mon, 18 Jul 2016 10:03:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Drew Adams Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 18 Jul 2016 14:03:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 24014 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 24014-submit@debbugs.gnu.org id=B24014.146885057327880 (code B ref 24014); Mon, 18 Jul 2016 14:03:01 +0000 Original-Received: (at 24014) by debbugs.gnu.org; 18 Jul 2016 14:02:53 +0000 Original-Received: from localhost ([127.0.0.1]:55848 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bP98C-0007FV-BO for submit@debbugs.gnu.org; Mon, 18 Jul 2016 10:02:53 -0400 Original-Received: from userp1040.oracle.com ([156.151.31.81]:31061) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bP985-0007FB-Jl for 24014@debbugs.gnu.org; Mon, 18 Jul 2016 10:02:46 -0400 Original-Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u6IE2YqX018157 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 18 Jul 2016 14:02:34 GMT Original-Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u6IE2XTv019090 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 18 Jul 2016 14:02:34 GMT Original-Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by aserv0122.oracle.com (8.13.8/8.13.8) with ESMTP id u6IE2Veo031559; Mon, 18 Jul 2016 14:02:32 GMT In-Reply-To: <578C993D.10507@gmail.com> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9 (901082) [OL 12.0.6744.5000 (x86)] X-Source-IP: userv0021.oracle.com [156.151.31.71] 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: 208.118.235.43 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:121216 Archived-At: > > Even providing a functional-programming definition of `reduce' is > > better than just describing it in abstract terms, if we can't come > > up with a more down-to-earth description. >=20 > What about adding a few examples? Something like this maybe? >=20 > (cl-reduce f '(1 2 3 4 5)) > =E2=86=94 (f (f (f (f 1 2) 3) 4) 5) >=20 > (cl-reduce f '(1 2 3 4 5) :initial-value 0) > =E2=86=94 (f (f (f (f (f 0 1) 2) 3) 4) 5) >=20 > (cl-reduce f '(1 2 3 4 5) :from-end t) > =E2=86=94 (f 1 (f 2 (f 3 (f 4 5)))) >=20 > (cl-reduce f '(1 2 3 4 5) :from-end t :initial-value 0) > =E2=86=94 (f 1 (f 2 (f 3 (f 4 (f 5 0))))) LGTM - except that f should be quoted as an arg to `cl-reduce'. E.g. (cl-reduce 'f '(1 2 3)). And a shorter list makes things a tiny bit simpler: (1 2 3). (And I'm not crazy about the too-short double arrow, personally.)