From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Check for redundancy Date: Fri, 03 Jul 2015 22:04:47 +0200 Message-ID: <87lhexovmo.fsf@nl106-137-147.student.uu.se> References: <87si95iqg8.fsf@kuiper.lan.informatimago.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1435953999 9791 80.91.229.3 (3 Jul 2015 20:06:39 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 3 Jul 2015 20:06:39 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Jul 03 22:06:30 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 1ZB7EE-0007EI-5O for geh-help-gnu-emacs@m.gmane.org; Fri, 03 Jul 2015 22:06:30 +0200 Original-Received: from localhost ([::1]:42443 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZB7ED-0000hy-21 for geh-help-gnu-emacs@m.gmane.org; Fri, 03 Jul 2015 16:06:29 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38599) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZB7E3-0000hs-QR for help-gnu-emacs@gnu.org; Fri, 03 Jul 2015 16:06:20 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZB7E0-0007xn-Ke for help-gnu-emacs@gnu.org; Fri, 03 Jul 2015 16:06:19 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:46655) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZB7E0-0007xg-DU for help-gnu-emacs@gnu.org; Fri, 03 Jul 2015 16:06:16 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZB7Dw-00076E-Sj for help-gnu-emacs@gnu.org; Fri, 03 Jul 2015 22:06:13 +0200 Original-Received: from nl106-137-246.student.uu.se ([130.243.137.246]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 03 Jul 2015 22:06:12 +0200 Original-Received: from embe8573 by nl106-137-246.student.uu.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 03 Jul 2015 22:06:12 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 39 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: nl106-137-246.student.uu.se Mail-Copies-To: never User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) Cancel-Lock: sha1:dBa+h0aimqr2EKkBlTfNfyPIodE= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 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:105403 Archived-At: "Pascal J. Bourguignon" writes: >> In Lisp the type of a variable is stored with the >> variable at runtime. > > No, never, ever, not in a billion years. > > In lisp, types are not associated with variables, > but with objects! Yeah, `integerp' is (integerp OBJECT) Return t if OBJECT is an integer. however, I don't think Mr. Thorpe was digging into that distinction, but rather that Lisp is "runtime/dynamic/execution typed" (excuses if that terminology is spoken for, if it isn't it fits) - i.e., it is not about variable vs. object, it is about static/code vs. dynamic/execution use of types. And Pascal J. Bourguignon knows this as well as he knows the technology - make the correction as you see fit, only keep it real at the same time. > However, assigning compilation-time types or using > hungarian notation has at least one big problem: > this prevent generic programming, by constraining > the types of your data much to early in general, Yes! That's exactly what I said with the DWIM char/string example. -- underground experts united http://user.it.uu.se/~embe8573