From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.help Subject: Re: return first element in list with certain property Date: Sun, 19 Nov 2017 12:51:41 -0800 Message-ID: <87fu9axa8y.fsf@ericabrahamsen.net> References: <8660a60zjn.fsf@zoho.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1511124954 16015 195.159.176.226 (19 Nov 2017 20:55:54 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 19 Nov 2017 20:55:54 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (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 21:55:50 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 1eGWd1-0003fJ-Cr for geh-help-gnu-emacs@m.gmane.org; Sun, 19 Nov 2017 21:55:47 +0100 Original-Received: from localhost ([::1]:54353 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eGWd7-0001jO-Av for geh-help-gnu-emacs@m.gmane.org; Sun, 19 Nov 2017 15:55:53 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44731) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eGWce-0001j6-6o for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 15:55:25 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eGWcb-0005K0-0A for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 15:55:24 -0500 Original-Received: from [195.159.176.226] (port=59917 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eGWca-0005Ir-Ol for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 15:55:20 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1eGWcN-0001SL-6Q for help-gnu-emacs@gnu.org; Sun, 19 Nov 2017 21:55:07 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 19 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:ZocgNCdz/RQ56Uh/IuRhWWqm5hk= 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:114984 Archived-At: Emanuel Berg writes: > 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 I think `cl-find' is what I use for this, with the :test keyword. Or `seq-find' seems to do the same thing.