From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.help Subject: Re: no empty (zero) string predicate in Elisp Date: Sun, 26 Apr 2015 20:59:09 +0200 Message-ID: <87pp6qbtsg.fsf@mbork.pl> References: <87h9s4rhx5.fsf@debian.uxu> <87wq0zkqxa.fsf@debian.uxu> <87oambhqze.fsf@kuiper.lan.informatimago.com> <87a8xu20ys.fsf@debian.uxu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1430074791 29543 80.91.229.3 (26 Apr 2015 18:59:51 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 26 Apr 2015 18:59:51 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Apr 26 20:59:40 2015 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YmRmF-00076e-Iy for geh-help-gnu-emacs@m.gmane.org; Sun, 26 Apr 2015 20:59:39 +0200 Original-Received: from localhost ([::1]:51777 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YmRmE-00030I-HY for geh-help-gnu-emacs@m.gmane.org; Sun, 26 Apr 2015 14:59:38 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54529) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YmRm3-00030C-Rt for help-gnu-emacs@gnu.org; Sun, 26 Apr 2015 14:59:28 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YmRlz-00031b-Oz for help-gnu-emacs@gnu.org; Sun, 26 Apr 2015 14:59:27 -0400 Original-Received: from mail.mojserwer.eu ([2a01:5e00:2:52::8]:34808) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YmRlz-00031R-HA for help-gnu-emacs@gnu.org; Sun, 26 Apr 2015 14:59:23 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id 168674F607A for ; Sun, 26 Apr 2015 20:59:18 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Original-Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id F05F4I2OBLR1 for ; Sun, 26 Apr 2015 20:59:15 +0200 (CEST) Original-Received: from localhost (unknown [109.232.24.146]) by mail.mojserwer.eu (Postfix) with ESMTPSA id B06384F6079 for ; Sun, 26 Apr 2015 20:59:14 +0200 (CEST) In-reply-to: <87a8xu20ys.fsf@debian.uxu> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2a01:5e00:2:52::8 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:104010 Archived-At: On 2015-04-26, at 20:34, Emanuel Berg wrote: > Cool. "Predicate" is a word from the grammars of human > languages, but I don't know its exact meaning, neither > there or in programming languages (until now as for > programming). AFAIK, "predicate" is a word from /logic/, and it means (more or less) a function which consumes one or more arguments of any type and gives back a truth-value. (Not necesarily exactly that, because Russell's paradox etc., but this is the idea.) Best, -- Marcin Borkowski http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski Faculty of Mathematics and Computer Science Adam Mickiewicz University