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: Why eev has a weird elisp tutorial and how to use it Date: Fri, 28 Jan 2022 03:49:32 +0100 Message-ID: <8735l8poar.fsf@zoho.eu> References: Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="36605"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:q1PLznbdeGQoglnk06AO2fusoYw= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jan 28 03:51:00 2022 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 1nDHLn-0009Kt-Cr for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 28 Jan 2022 03:50:59 +0100 Original-Received: from localhost ([::1]:40188 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nDHLm-0002Te-EE for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 27 Jan 2022 21:50:58 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:33138) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nDHKc-0002TV-3b for help-gnu-emacs@gnu.org; Thu, 27 Jan 2022 21:49:46 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:57178) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nDHKZ-0003lE-IY for help-gnu-emacs@gnu.org; Thu, 27 Jan 2022 21:49:45 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1nDHKY-0007sV-3y for help-gnu-emacs@gnu.org; Fri, 28 Jan 2022 03:49:42 +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: -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=0.249, 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: 2.1.29 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:135581 Archived-At: And this video is - hopefully - a first step to make my tutorial less mysterious. So: that's it. That's what i wanted to show. Bye! =) [1] Yeah, that was a verbose and informal intro from a personal POV if there ever was one - and except for the thing I already mentioned, that people should learn to read code first, where I disagree 100%, from my POV but also in general - but except for that, all's cool obviously, but ... Where is the actual Elisp intro? :O There's no transcript of that? That's the one, if one only has one, that one should have! My own POV is rather different, I think. TBH I don't remember ever having a problem with Elisp at the early stages actually ... a cheat sheet (crib sheet) with all the basic stuff (meaning a lot since there is a lot) and on top of that a cookbook of more advanced, but still common methods and situations - this OTOH can be commented, tho briefly - those two documents would have perhaps speeded up early effort. "Methods and situations" would include small demos and skeleton code with concepts such as DWIM, closures, stuff like that, the more Lispy stuff. Nothing a beginner can't handle if presented right. Example DWIM: ;;; -*- lexical-binding: t -*- ;;; ;;; this file: ;;; https://dataswamp.org/~incal/emacs-init/dwim.el ;; DWIM interface (defun test-dwim (&optional beg end) (interactive (when (use-region-p) (list (region-beginning) (region-end)) )) (let ((bg (or beg (point-min))) ; or just (point) here (ed (or end (point-max))) ) (list bg ed) ; code here )) ;; test the interface (when nil (save-excursion (set-mark 10) (goto-char 500) (call-interactively #'test-dwim) ) ; (10 500) (call-interactively #'test-dwim) ; ( 1 1163) (test-dwim 30 90) ; (30 90) (test-dwim) ; ( 1 1163) ) ;; example function (defun count-chars (&optional beg end) (interactive (when (use-region-p) (list (region-beginning) (region-end)) )) (let*((bg (or beg (point-min))) (ed (or end (point-max))) (diff (- ed bg)) ) (prog1 diff (message "%d" diff) ))) ;; test the example function ;; (call-interactively #'count-chars) ; 1162 ;; (count-chars) ; 1162 ;; (count-chars 10 40) ; 30 ;; (+ 1111 (count-chars)) ; 2273 [1] http://angg.twu.net/find-elisp-intro.html -- underground experts united https://dataswamp.org/~incal