Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!feeder2.ecngs.de!ecngs!feeder.ecngs.de!xlned.com!feeder1.xlned.com!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.002 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; '(at': 0.03; 'exception': 0.03; 'explicitly': 0.04; 'closed,': 0.09; 'closed.': 0.09; 'subject:command': 0.09; 'anyway': 0.11; 'deleted,': 0.16; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; 'merely': 0.16; 'message- id:@mrabarnett.plus.com': 0.16; 'received:84.93': 0.16; 'received:84.93.230': 0.16; 'record?': 0.16; 'wrote:': 0.17; 'pointer': 0.17; 'raise': 0.24; 'least': 0.25; 'header:In-Reply- To:1': 0.25; 'header:User-Agent:1': 0.26; 'possibly': 0.27; "doesn't": 0.28; 'record': 0.28; '(possibly': 0.29; 'received:192.168.1.3': 0.29; 'that.': 0.30; 'file': 0.32; 'received:84': 0.32; 'to:addr:python-list': 0.33; 'version': 0.34; 'options:': 0.35; 'next': 0.35; 'does': 0.37; 'option': 0.37; 'subject:: ': 0.38; 'to:addr:python.org': 0.39; 'received:192': 0.39; 'received:192.168': 0.40; 'think': 0.40; 'disappear': 0.84; 'furman': 0.84; 'seventh': 0.84; 'ethan': 0.91; 'subject:records': 0.91 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.0 cv=FLuZNpUs c=1 sm=1 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=YsUzL_8ObRgA:10 a=NAy-WIAmZUIA:10 a=ihvODaAuJD4A:10 a=8nJEP1OIZ-IA:10 a=EBOSESyhAAAA:8 a=yowENhnX8ppAwDD_tT0A:9 a=wPNLvfGTeEIA:10 a=0nF1XD0wxitMEM03M9B4ZQ==:117 X-AUTH: mrabarnett:2500 Date: Wed, 18 Jul 2012 01:01:36 +0100 From: MRAB User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20120614 Thunderbird/13.0.1 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Foxpro goto command and deleted records References: <5005EDC0.6050608@stoneleaf.us> In-Reply-To: <5005EDC0.6050608@stoneleaf.us> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 29 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1342569875 news.xs4all.nl 6946 [2001:888:2000:d::a6]:57540 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:25547 On 17/07/2012 23:57, Ethan Furman wrote: > In Foxpro if you do a > > GOTO 7 > > with deleted off and record 7 is deleted, the record pointer doesn't > move (at least in version 6). > > I don't like that. > > I see four other options: > > 0) don't move the pointer (listed for completeness) > 1) go to that record anyway > 2) go to the next undeleted record > 3) go to the seventh undeleted record (possibly the least practical) > 4) raise an exception > > Any opinions? > What happens when you 'delete' a record? Does it disappear immediately, or is it merely marked for deletion? If it is marked for deletion, can it be unmarked? Will a marked record be removed when the file is closed, or does the file need to be explicitly purged/compacted? If it is merely marked, then I think the best option is 1, or possibly 4 if the file is compacted when closed.