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: Tue, 06 Mar 2018 10:29:07 +0100 Organization: Aioe.org NNTP Server Message-ID: <86fu5dsgbg.fsf@zoho.com> References: <8660a60zjn.fsf@zoho.com> <86k1upshyr.fsf@zoho.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1520328517 390 195.159.176.226 (6 Mar 2018 09:28:37 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 6 Mar 2018 09:28:37 +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 Tue Mar 06 10:28:33 2018 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 1et8tQ-0006YO-OV for geh-help-gnu-emacs@m.gmane.org; Tue, 06 Mar 2018 10:28:20 +0100 Original-Received: from localhost ([::1]:54398 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1et8vT-0004YJ-EN for geh-help-gnu-emacs@m.gmane.org; Tue, 06 Mar 2018 04:30:27 -0500 Original-Path: usenet.stanford.edu!goblin3!goblin.stu.neva.ru!inn10.news.alteholz.net!news.in-chemnitz.de!news2.arglkargh.de!news.mixmin.net!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 37 Original-NNTP-Posting-Host: UHWYWQF2IuZrSKObhXEbig.user.gioia.aioe.org Original-X-Complaints-To: abuse@aioe.org Mail-Copies-To: never Cancel-Lock: sha1:IQu3Gcoe1/pVRO8ghjDxGDGWpS0= X-Notice: Filtered by postfilter v. 0.8.3 Original-Xref: usenet.stanford.edu gnu.emacs.help:222000 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:116115 Archived-At: > OK, but without having tested it, is there > any reason to favor it to `cl-find-if'? Now I have tested it and it seems "list-find-if" is a little faster than `cl-find-if'! So good job even tho I will stick to CL thank you :) (require 'cl-lib) (defun list-find-if (pred xs) (while (and (consp xs) (not (funcall pred (car xs))) ) (pop xs) ) (car xs) ) (let*((max-value 1000000) (random-list (create-random-list max-value max-value)) (bigger-than-random (lambda (e) (> e (random max-value)))) ) (message "Testing for %s" max-value) (message "Test list-find-if: %s" (measure-time (list-find-if bigger-than-random random-list)) ) (message "Test cl-find-if: %s" (measure-time (cl-find-if bigger-than-random random-list)) ) ) "create-random-list" and "measure-time" here: http://user.it.uu.se/~embe8573/emacs-init/measure.el -- underground experts united http://user.it.uu.se/~embe8573