From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: =?utf-8?B?R8O2a3R1xJ8=?= Kayaalp Newsgroups: gmane.emacs.devel Subject: Re: Changing line widths in the Emacs source code Date: Sun, 13 Sep 2020 23:13:43 +0300 Message-ID: <87o8m9sadk.fsf@gkayaalp.com> References: <87tuw1x016.fsf@gnus.org> <20200913142210.GA4285@ACM> <87d02pmsi7.fsf@t510.orion.oneofus.la> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="25062"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: mu4e 1.2.0; emacs 28.0.50 Cc: Alan Mackenzie To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Sep 13 22:15:01 2020 Return-path: Envelope-to: ged-emacs-devel@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 1kHYOr-0006Nv-DO for ged-emacs-devel@m.gmane-mx.org; Sun, 13 Sep 2020 22:15:01 +0200 Original-Received: from localhost ([::1]:38158 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kHYOq-0005RS-FI for ged-emacs-devel@m.gmane-mx.org; Sun, 13 Sep 2020 16:15:00 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39592) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHYNj-0004N7-Ks for emacs-devel@gnu.org; Sun, 13 Sep 2020 16:13:51 -0400 Original-Received: from relay2-d.mail.gandi.net ([217.70.183.194]:53821) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHYNh-0004UA-B7 for emacs-devel@gnu.org; Sun, 13 Sep 2020 16:13:51 -0400 X-Originating-IP: 31.177.204.112 Original-Received: from localhost (unknown [31.177.204.112]) (Authenticated sender: self@gkayaalp.com) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id D0FAA40004; Sun, 13 Sep 2020 20:13:44 +0000 (UTC) In-reply-to: <87d02pmsi7.fsf@t510.orion.oneofus.la> Received-SPF: none client-ip=217.70.183.194; envelope-from=self@gkayaalp.com; helo=relay2-d.mail.gandi.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/13 13:34:55 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:255568 Archived-At: On 2020-09-13 21:38 +03, Vladimir Sedach wrote: > Alan Mackenzie writes: > The optimum line length for legibility has been found to be 55-60 > characters over hundreds of years of book publishing experience. 90 > characters per line is considered the absolute maximum, and you > rarely see it. "Today's wide screens" is as bad of a reason for > increasing line length in text files as "today's wide paper" would be > an excuse to increase line length in books. Not to refute any other points here, but this is an oft-mentioned factoid, yet code is not prose, so how relevant this is is questionable. Most importantly, a decent chunk of an average line is indentation: (require 'cl-lib) (let ((spaces '(0)) (line-count 1)) (with-current-buffer "org.el.gz" (goto-char (point-min)) (while (not (looking-at "\\'")) ;; expand tabs, 8 spaces in my setup (untabify (line-beginning-position) (save-excursion (back-to-indentation) (point))) (push (- (save-excursion (back-to-indentation) (point)) (line-beginning-position)) spaces) (cl-incf line-count) ;; beginning of next line (goto-char (1+ (line-end-position))))) (message "On average %f spaces worth of indentation per line (%d lines)" (/ (apply #'+ spaces) (float line-count)) line-count)) =3D> "On average 7.957429 spaces worth of indentation per line (21235 lines= )" So assuming 80-char lines, on average 1/10 of a line is leading whitespace. -- =C4=B0. G=C3=B6ktu=C4=9F Kayaalp / @cadadr / pgp: 024C 30DD 597D 142B 49AC 40EB 465C D949 B101 2427