From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: count char in string [The Emacs Challenge Competition - round 2, with fallout] Date: Sat, 28 Nov 2020 02:26:38 +0100 Message-ID: <87ft4ujmpd.fsf@zoho.eu> References: <87r1pj41wa.fsf@zoho.eu> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="26840"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:gr2SykgPeEeUMyE/Kj98DlDVIMM= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Nov 28 02:29:44 2020 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kip3Y-0006sq-Ka for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 28 Nov 2020 02:29:44 +0100 Original-Received: from localhost ([::1]:45480 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kip3X-0000aC-6R for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 27 Nov 2020 20:29:43 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:47070) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kip0j-0008Ih-2c for help-gnu-emacs@gnu.org; Fri, 27 Nov 2020 20:26:49 -0500 Original-Received: from static.214.254.202.116.clients.your-server.de ([116.202.254.214]:35584 helo=ciao.gmane.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kip0h-0002Mv-FY for help-gnu-emacs@gnu.org; Fri, 27 Nov 2020 20:26:48 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kip0e-0003Ta-3r for help-gnu-emacs@gnu.org; Sat, 28 Nov 2020 02:26:44 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:125710 Archived-At: Corwin Brust wrote: > (defun count-char-in-string (string char) > "Return the number of occurances of CHAR in STRING." > (seq-count (apply-partially 'eq char) > (seq-into string 'list))) OK, that looks better than mine so I take it. But you have to require seq or the byte compiler will complain. (require 'seq) (defun count-char-in-string (string char) (seq-count (apply-partially 'eq char) (seq-into string 'list)) ) ;; (count-char-in-string "Emacs skills kills" ?a) ; 1 > (count-char-in-string "hii" ?I) ;; ⇒ 2 That's 0 :) because it is case sensitive (as it should) -- underground experts united http://user.it.uu.se/~embe8573 https://dataswamp.org/~incal