From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: return first element in list with certain property Date: Sun, 19 Nov 2017 23:51:54 +0100 Message-ID: <86shd9zxth.fsf@zoho.com> References: <84a7ziq855.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1511132462 26707 195.159.176.226 (19 Nov 2017 23:01:02 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 19 Nov 2017 23:01:02 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Nov 20 00:00:56 2017 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eGYa5-0006Mg-3o for geh-help-gnu-emacs@m.gmane.org; Mon, 20 Nov 2017 00:00:53 +0100 Original-Received: from localhost ([::1]:54659 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eGYaA-0007kb-Ta for geh-help-gnu-emacs@m.gmane.org; Sun, 19 Nov 2017 18:00:58 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:40827) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eGYZc-0007kT-QC for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 18:00:25 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eGYZX-0006iK-M9 for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 18:00:24 -0500 Original-Received: from [195.159.176.226] (port=53687 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eGYZX-0006i3-Ed for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 18:00:19 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1eGYZJ-0003iy-5N for help-gnu-emacs@gnu.org; Mon, 20 Nov 2017 00:00:05 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 21 Original-X-Complaints-To: usenet@blaine.gmane.org Mail-Copies-To: never Cancel-Lock: sha1:kFTuIv/d/P9jg8jr4Y0Ch+OY+oo= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.help:114993 Archived-At: Marco Wahl wrote: >> What is considered the right way to return >> the first element in list that has a certain >> property? The best way I've found so far is >> `cl-some' and then `and'. While I don't >> consider the "`and' hack" to be detrimental >> in any way I was curious if there was >> a complete "hack free" way... Example: get >> the first element that is bigger than 1: >> (cl-some (lambda (e) (and (> e 1) e)) '(1 1 >> 3 1 4 2)) ; 3 > > (cl-loop for e in '(1 1 3 1 4 2) when (> e 1) > return e) Much worse than mine :) -- underground experts united http://user.it.uu.se/~embe8573