From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.help Subject: Re: How to mapcar or across a list? Date: Wed, 15 Jul 2015 22:55:15 +0200 Message-ID: <87egk9m98s.fsf@mbork.pl> References: <87io9lmb4z.fsf@mbork.pl> <87fv4pywyi.fsf@gmx.us> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1436993756 9694 80.91.229.3 (15 Jul 2015 20:55:56 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 15 Jul 2015 20:55:56 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Jul 15 22:55:47 2015 Return-path: Envelope-to: geh-help-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 1ZFTiU-0001Nl-Hq for geh-help-gnu-emacs@m.gmane.org; Wed, 15 Jul 2015 22:55:46 +0200 Original-Received: from localhost ([::1]:37462 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZFTiT-0000Wz-LP for geh-help-gnu-emacs@m.gmane.org; Wed, 15 Jul 2015 16:55:45 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42301) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZFTiG-0000Wp-VC for help-gnu-emacs@gnu.org; Wed, 15 Jul 2015 16:55:34 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZFTiD-0004sV-Ns for help-gnu-emacs@gnu.org; Wed, 15 Jul 2015 16:55:32 -0400 Original-Received: from mail.mojserwer.eu ([2a01:5e00:2:52::8]:38469) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZFTiD-0004sD-G6 for help-gnu-emacs@gnu.org; Wed, 15 Jul 2015 16:55:29 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id 0FACB512011 for ; Wed, 15 Jul 2015 22:55:19 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Original-Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id wAsuN3a-WZdT for ; Wed, 15 Jul 2015 22:55:16 +0200 (CEST) Original-Received: from localhost (unknown [109.232.24.146]) by mail.mojserwer.eu (Postfix) with ESMTPSA id 9C4624F607B for ; Wed, 15 Jul 2015 22:55:16 +0200 (CEST) In-reply-to: <87fv4pywyi.fsf@gmx.us> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2a01:5e00:2:52::8 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:105739 Archived-At: On 2015-07-15, at 22:42, Rasmus wrote: > Marcin Borkowski writes: > >> Hi there, >> >> so here's my problem: I have a list of Boolean values, and I want to >> `mapcar' an `or' across it (IOW, I want to test whether at least one of >> them is true). Of course, (apply #'or my-list) does not work. Of >> course, I can (cl-reduce (lambda (x y) (or x y)) my-list) -- but is >> there a better method? >> >> BTW, my-list doesn't really exist: it is a result of `mapcar'ing >> a function taking some value and yielding a Boolean value, so bonus >> points if the method does not process the whole list. > > Does cl-some and cl-every fit the bill? Ha. Their only drawback is that I didn't know about them... > Rasmus Thanks! -- Marcin Borkowski http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski Faculty of Mathematics and Computer Science Adam Mickiewicz University