From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Pascal J. Bourguignon" Newsgroups: gmane.emacs.help Subject: Re: etymology of obarray Date: Fri, 16 May 2014 20:41:29 +0200 Organization: Informatimago Message-ID: <874n0pk1ly.fsf@kuiper.lan.informatimago.com> References: <87ppjdvc6o.fsf@debian.uxu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1400265927 25843 80.91.229.3 (16 May 2014 18:45:27 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 16 May 2014 18:45:27 +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 May 16 20:45:22 2014 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 1WlN8B-0004GR-86 for geh-help-gnu-emacs@m.gmane.org; Fri, 16 May 2014 20:45:19 +0200 Original-Received: from localhost ([::1]:37312 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WlN8A-0002px-OC for geh-help-gnu-emacs@m.gmane.org; Fri, 16 May 2014 14:45:18 -0400 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 43 Original-X-Trace: individual.net Ov8zL3X4DKdjD25PzvB5qQHJQcy/lgg7SC9sQs81MiqezCk9YB Cancel-Lock: sha1:NWVlZGQ5MDQxYzZlNDQwMDY5ZTg1ODhkOTRkMDcxMWU2OWVkOTY4Mg== sha1:MpPvyzKmRyE8JyBeU69IQJoId54= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Original-Xref: usenet.stanford.edu gnu.emacs.help:205452 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:97720 Archived-At: Emanuel Berg writes: > Joe Riel writes: > >> Where does the word obarray originate? What is "ob"? > > Object, perhaps? Just a guess, but if you are Yes, Object Array. It already existed in MACLISP: http://www.maclisp.info/pitmanual/symbol.html Originally, in LISP 1.5, it was an OBLIST. cf. page 12 of http://www.dreamsongs.com/Files/HOPL2-Uncut.pdf And in LISP 1.5 we have those occurences of OBLIST: grep -niH -e oblist lisp15.asm lisp15.asm:1531: AXC OBLIST,2 POINTER TO OBJECT LIST lisp15.asm:1534: RNT DEBUGI SKIP MARKING OBLIST IF IN A DEBUG lisp15.asm:8871:OBLIST SYN BUCKET lisp15.asm:8951: OBLBA,,-*-1 OBLIST OBJECT GENER068 lisp15.asm:9921: -OBLIST GPLI0823 lisp15.asm:9923: -*-1 OBLIST GPLI0825 > interested in the obarray in general I remember asking > about it way back - because as I recall, the > documentation was cryptic to say the least - and there > were some very advanced replies, as I remember. So hit > the archives, look for Emanuel Berg and "obarray" in > the Subject header. Report back everything you learn :) > > As I recall, the obarray is a data structure (some kind > of hash table) to store stuff dynamically (i.e., not > just in memory) so that you can filter and do stuff > with it - for example, to provide the set of operands > possible after you invoke a command. -- __Pascal Bourguignon__ http://www.informatimago.com/ "Le mercure monte ? C'est le moment d'acheter !"