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=-0.3 required=5.0 tests=BAYES_00, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!feeder.erje.net!eu.feeder.erje.net!newsfeed.datemas.de!rt.uk.eu.org!news.roellig-ltd.de!open-news-network.org!cyclone01.ams2.highwinds-media.com!voer-me.highwinds-media.com!peer01.am1!peering.am1!peer02.fr7!news.highwinds-media.com!post02.fr7!fx31.fr7.POSTED!not-for-mail Message-ID: <3ar2JRBR4smTFwAN@ada-augusta.demon.co.uk> From: Mike H Reply-To: Mike Hopkins Newsgroups: comp.lang.ada Subject: Re: OT: A bit of Sudoku References: <5365d3f0-43cc-47ef-989c-d47992c84c9f@googlegroups.com> MIME-Version: 1.0 Content-Type: text/plain;charset=us-ascii;format=flowed User-Agent: Turnpike/6.07-M () NNTP-Posting-Host: 83.104.138.185 X-Complaints-To: abuse@demon.net X-Trace: 1402654564 83.104.138.185 (Fri, 13 Jun 2014 10:16:04 UTC) NNTP-Posting-Date: Fri, 13 Jun 2014 10:16:04 UTC Date: Fri, 13 Jun 2014 11:10:25 +0100 X-Received-Body-CRC: 626511599 X-Received-Bytes: 1582 Xref: news.eternal-september.org comp.lang.ada:20283 Date: 2014-06-13T11:10:25+01:00 List-Id: In message , Shark8 writes > > -- Definition of "=" returns true when both sides are NULL, > -- returns false when only one side is NULL, and behaves as > -- normal string-equality when neither side is NULL. Is this an example where Dmitry's three state logical (True, Uncertain, False) might be useful? See -- The moving finger keys; and, having keyed, keys 'send'; nor all one's piety nor wit shall lure it back to cancel half a line, nor all one's tears wash out one word of it. Mike