From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 1108a1,9a0ff0bffdf63657 X-Google-Attributes: gid1108a1,public X-Google-Thread: fac41,9a0ff0bffdf63657 X-Google-Attributes: gidfac41,public X-Google-Thread: 103376,4b06f8f15f01a568 X-Google-Attributes: gid103376,public X-Google-Thread: f43e6,9a0ff0bffdf63657 X-Google-Attributes: gidf43e6,public From: dennison@telepath.com Subject: Re: Software landmines (loops) Date: 1998/09/01 Message-ID: <6sh30l$k4i$1@nnrp1.dejanews.com>#1/1 X-Deja-AN: 386790325 References: <6r9f8h$jtm$1@nnrp1.dejanews.com> <6renh8$ga7$1@nnrp1.dejanews.com> <6rf59b$2ud$1@nnrp1.dejanews.com> <6rfra4$rul$1@nnrp1.dejanews.com> <35DBDD24.D003404D@calfp.co.uk> <6sbuod$fra$1@hirame.wwa.com> <35f51e53.48044143@news.erols.com> <6sdiav$e0g$1@hirame.wwa.com> <6sfcft$70p$1@hirame.wwa.com> <6sfcu4$bks@saluki-news.it.siu.edu> <35ed3d4a.2378710@news.erols.com> <6sfqul$ggg$1@hirame.wwa.com> X-Http-Proxy: 1.0 x2.dejanews.com:80 (Squid/1.1.22) for client 204.48.27.130 Organization: Deja News - The Leader in Internet Discussion X-Article-Creation-Date: Tue Sep 01 15:14:28 1998 GMT Newsgroups: comp.lang.eiffel,comp.object,comp.software-eng,comp.lang.ada X-Http-User-Agent: Mozilla/4.05 [en] (WinNT; I) Date: 1998-09-01T00:00:00+00:00 List-Id: In article <6sfqul$ggg$1@hirame.wwa.com>, "Robert Martin" wrote: > > Ell wrote in message <35ed3d4a.2378710@news.erols.com>... > >"Agent" wrote: > > > >>Robert Martin wrote in message <6sfcft$70p$1@hirame.wwa.com>... > >>>Stephen Leake wrote in message ... > > >>>>One entry, one exit. Perfectly clear. There's nothing magic about > >>>>putting the exit statement at the top or the bottom! > >>> > >>>In fact there is. If the exit condition is at the top or the bottom, > >>then > >>>the body of the loop will always be excuted an exact integral number of > >>>times. However if the loop condition is in the middle, then the loop > >>body > >>>will be executed a fractional number of times. > > > >So what? > > The the invariants of the loop body are different depending on whether the > iteration is the last or not. Also, a programmer must be aware that the > last statement in the loop body will not be executed on the last iteration. Yes, but if that's what the algorithm is *supposed* to do, rephrasing it with flags and if statements won't change that. -- T.E.D. -----== Posted via Deja News, The Leader in Internet Discussion ==----- http://www.dejanews.com/rg_mkgrp.xp Create Your Own Free Member Forum