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: Re: Making ielm behave like a shell (getting to previous commands using the up-arrow key) Date: Thu, 17 Dec 2020 12:06:57 +0300 Message-ID: References: <87im91ys4m.fsf@web.de> <874kklyqi2.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="39535"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0 (3d08634) (2020-11-07) Cc: Michael Heerdegen , help-gnu-emacs@gnu.org To: steve-humphreys@gmx.com Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Dec 17 10:10:14 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 1kppIc-000ACj-0J for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 17 Dec 2020 10:10:14 +0100 Original-Received: from localhost ([::1]:43402 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kppIb-0006Ke-29 for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 17 Dec 2020 04:10:13 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41722) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kppIF-0006KC-PV for help-gnu-emacs@gnu.org; Thu, 17 Dec 2020 04:09:51 -0500 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:40101) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kppID-0005B0-Uk for help-gnu-emacs@gnu.org; Thu, 17 Dec 2020 04:09:51 -0500 Original-Received: from localhost ([::ffff:197.157.0.58]) (AUTH: PLAIN securesender, TLS: TLS1.2,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000308FB.000000005FDB205B.0000550F; Thu, 17 Dec 2020 02:09:46 -0700 Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_SORBS_WEB=1.5, 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:126460 Archived-At: * steve-humphreys@gmx.com [2020-12-17 08:20]: > ielm should be described in "An Introduction to Programming in Emacs > Lisp". It is very useful when starting with lisp. I am often using M-: to evaluate in one line and ielm rarely. When I need to evaluate I also write it in any buffer and just evaluate with C-x C-e, including in text buffers. Then I also use `setq' dynamically many times when debugging: Then I may do in first step this and get my-var as 1, it becomes global but I don't care. (defun my-function () (let* ((setq my-var 1) (new (+ my-var 2))) new)) Then I do this and evaluate new to be 4, it becomes global, but I don't care. (defun my-function () (let* ((my-var 1) (setq new (+ my-var 2))) new)) As that is one way of debugging. But I think I will make function to evaluate those lines without inserting `setq' and deleting `setq' afterwards as it is repetitive. (defun eval-with-setq-sexp () (interactive) (let* ((sexp (thing-at-point 'list)) (end (length sexp)) (just-do (set-text-properties 0 end nil sexp)) (sexp (replace-regexp-in-string "^(" "(setq " sexp))) (message "%s" (eval (car (read-from-string sexp)))))) Then I could just bind this to a key and move into various parts of (let FORM) to evaluate those variables when debugging. But I guess I have to move to beginning or first variable like `a' or `b' here below: (global-set-key (kbd "") 'eval-with-setq-sexp) (let ((a 1) ; <-- go on a and press your key like F5 and A becomes 1 (something-else "Here") ; <-- on `something-else' with F5 it becomes "Here" (b (+ 2 1)))) ; <-- on `b' F5 assigns value 3 to b Spares me time. I also use instrumenting of a function when I wish to quickly debug something. But too often I used (setq slow motion writing it and typing. I will now switch to key bound debugging with the above function. Jean