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: negative subtraction Date: Mon, 27 Sep 2021 03:33:43 +0200 Message-ID: <87k0j2ssy0.fsf@zoho.eu> 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="22622"; 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:xzN64Vr8l3G4LrtrVfcYenNtuQs= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Sep 27 03:34:24 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 1mUfXE-0005fS-1Q for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 27 Sep 2021 03:34:24 +0200 Original-Received: from localhost ([::1]:57532 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mUfXC-0006pm-By for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 26 Sep 2021 21:34:22 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34664) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mUfWk-0006pK-OA for help-gnu-emacs@gnu.org; Sun, 26 Sep 2021 21:33:54 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:34968) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mUfWj-0001Jn-4X for help-gnu-emacs@gnu.org; Sun, 26 Sep 2021 21:33:54 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mUfWh-00050R-Hw for help-gnu-emacs@gnu.org; Mon, 27 Sep 2021 03:33:51 +0200 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:133277 Archived-At: ;;; -*- lexical-binding: t -*- ;;; ;;; this file: ;;; http://user.it.uu.se/~embe8573/emacs-init/negative-subtraction.el ;;; https://dataswamp.org/~incal/emacs-init/negative-subtraction.el (require 'cl-lib) (require 'parse-time) (defun negative-subtract (a b) (let*((a-nums (number-to-list a)) (b-nums (number-to-list b)) ) (cl-loop for i in a-nums for j in b-nums collect (- i j) ))) ;; (negative-subtract 8888 7777) ; (1 1 1 1) (defun number-to-list (n) (cl-loop for d across (prin1-to-string n) collect (cl-digit-char-p d) )) ;; (number-to-list 1234) ; (1 2 3 4) -- underground experts united https://dataswamp.org/~incal