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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,a10fc2d4d530dd05
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,UTF8
Path: 
 g2news1.google.com!news3.google.com!feeder.news-service.com!feeder.erje.net!news2.arglkargh.de!news.tornevall.net!.POSTED!not-for-mail
From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Random number generation
Date: Tue, 13 Jul 2010 16:02:49 -0700
Organization: TornevallNET - http://news.tornevall.net
Message-ID: <i1irmb$vfe$1@tornado.tornevall.net>
References: 
 <b0c6a927-dbe6-40e4-8763-d99de0057a16@k39g2000yqb.googlegroups.com>
 <i1i3cc$8ro$1@tornado.tornevall.net>
 <nospam-A035A2.16333613072010@reserved-multicast-range-NOT-delegated.example.com>
NNTP-Posting-Host: 3f8fddafae58e59c76416f64abe3bdcc
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-Trace: 10a858dad4f79d874452b371e7e900e4
X-Complaints-To: abuse@tornevall.net
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US;
 rv:1.9.1.10) Gecko/20100527 Thunderbird/3.0.5
X-Complaints-Language: Spoken language is english or swedish - NOT ITALIAN,
 FRENCH, GERMAN OR ANY OTHER LANGUAGE!
In-Reply-To: 
 <nospam-A035A2.16333613072010@reserved-multicast-range-NOT-delegated.example.com>
X-UserIDNumber: 1738
X-Validate-Post: 
 http://news.tornevall.net/validate.php?trace=10a858dad4f79d874452b371e7e900e4
X-Complaints-Italiano: Non abbiamo padronanza della lingua italiana - se
 mandate una email scrivete solo in Inglese, grazie
X-Posting-User: 0243687135df8c4b260dd4a9a93c79bd
Xref: g2news1.google.com comp.lang.ada:12404
Date: 2010-07-13T16:02:49-07:00
List-Id: <comp.lang.ada>

On 07/13/2010 01:33 PM, John B. Matthews wrote:
>
> The shuffling algorithm needs work; this might be an alternative:
>
> <http://en.wikipedia.org/wiki/Fisher–Yates_shuffle>

The problem with this (for Ada) is the need to instantiate Discrete_Random for a 
different range each time (although you could use 
PragmARC.Universal_Random.Random_Int). If it's for a game with a human, then the 
biased version of using the full range each time is good enough

> As an aside, Mine Detector V6.0 builds on Mac OS X 10.5.8 with GtkAda
> 2.14.1 and GNAT 4.3.4. Wait, I took a picture:
>
> <http://i26.tinypic.com/23qyxxi.png>

Cool. I wouldn't check any boxes with only 100 mines.

-- 
Jeff Carter
"When Roman engineers built a bridge, they had to stand under it
while the first legion marched across. If programmers today
worked under similar ground rules, they might well find
themselves getting much more interested in Ada!"
Robert Dewar
62