From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Elisp version of CL: (format t "~:d" NUM) Date: Fri, 21 May 2021 22:02:40 +0300 Message-ID: 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="33438"; mail-complaints-to="usenet@ciao.gmane.io" To: Help GNU Emacs Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri May 21 21:04:18 2021 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 1lkARU-0008RB-KK for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 21 May 2021 21:04:16 +0200 Original-Received: from localhost ([::1]:39418 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lkART-0006RW-K7 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 21 May 2021 15:04:15 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34648) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lkAQj-0006Oq-Uz for help-gnu-emacs@gnu.org; Fri, 21 May 2021 15:03:30 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:36639) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lkAQi-00087J-70 for help-gnu-emacs@gnu.org; Fri, 21 May 2021 15:03:29 -0400 Original-Received: from localhost ([::ffff:154.224.42.9]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000ADF16.0000000060A803DD.00004577; Fri, 21 May 2021 12:02:53 -0700 Received-SPF: pass client-ip=217.170.207.13; envelope-from=support1@rcdrun.com; helo=stw1.rcdrun.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_PASS=-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:130002 Archived-At: In Common Lisp it is very easy to get readable comma separated digits: (clisp-macro (format t "~:d" 123456890)) ⇒ "123,456,890" As from: http://www.lispworks.com/documentation/HyperSpec/Body/22_cbb.htm In Emacs Lisp I have made this below, did not tested it much yet. And I think this function is way too big. Maybe there is some simpler way? (defun number-comma-char (num) "For NUM return readable comma separated digits." (let* ((num (cond ((numberp num) (number-to-string num)) (t num))) (decimal (string-match "\\." num)) (rest (if decimal (substring num decimal) "")) (num (if decimal (substring num 0 decimal) num)) (count 1) (list) (chain (seq-map 'identity (reverse num)))) (while chain (let ((char (pop chain))) (cond ((and (= (truncate (/ count 3.0)) (/ count 3.0)) chain) (progn (push char list) (push ?, list))) (t (push char list))) (setq count (1+ count)))) (concat (mapconcat 'char-to-string list "") rest))) (number-comma-char 123456.0) ⇒ "123,456.0" Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns Sign an open letter in support of Richard M. Stallman https://stallmansupport.org/