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: return first element in list with certain property Date: Sun, 19 Nov 2017 21:43:56 +0100 Message-ID: <8660a60zjn.fsf@zoho.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1511124290 31262 195.159.176.226 (19 Nov 2017 20:44:50 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 19 Nov 2017 20:44:50 +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 Sun Nov 19 21:44:45 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 1eGWSD-0007L3-94 for geh-help-gnu-emacs@m.gmane.org; Sun, 19 Nov 2017 21:44:37 +0100 Original-Received: from localhost ([::1]:54327 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eGWSK-0007mo-Lb for geh-help-gnu-emacs@m.gmane.org; Sun, 19 Nov 2017 15:44:44 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42864) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eGWRs-0007mj-IA for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 15:44:17 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eGWRp-0007cA-G4 for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 15:44:16 -0500 Original-Received: from [195.159.176.226] (port=40201 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eGWRp-0007aZ-8j for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 15:44:13 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1eGWRZ-0004yg-4y for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 21:43:57 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 18 Original-X-Complaints-To: usenet@blaine.gmane.org Mail-Copies-To: never Cancel-Lock: sha1:n/1u4CB+ZQsVBtrJUN4FxTUvwKU= 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:114982 Archived-At: 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 -- underground experts united http://user.it.uu.se/~embe8573