Manuel,
correction: my first tests were performed in RBDOS65.
6.5++ performs as:
10
3
335
33
355
217
536
195
700
949
----- Original Message -----
From: Jouke Hendrik de Vries <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, April 23, 2001 8:30 PM
Subject: Re: Randomly generated unique numbers - Razzak's Reply
> Manuel,
>
> I got the exact same results and I agree that the RANDOM function could be
> created a bit smarter.
>
> set var vcounter int = 0
> out test.txt
> while vcounter < 10 the
> set var vtest = (random(1000))
> sho var vtest
> set var vcounter = (vcounter + 1)
> endw
> out scree
>
> Results first run:
> 513
> 175
> 308
> 534
> 947
> 171
> 702
> 226
> 494
> 124
>
> Results second run
> 513
> 175
> 308
> 534
> 947
> 171
> 702
> 226
> 494
> 124
>
> Exactly the same.
> ----- Original Message -----
> From: Manuel de Aguiar <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Monday, April 23, 2001 8:19 PM
> Subject: Re: Randomly generated unique numbers - Razzak's Reply
>
>
> > Hello Jouke,
> >
> > Did you get the same result as I did on your computer when you type:
> > set var vrand = (random(1000))
> > and repeating this process?
> > I performed this test on a W98 and a W95 computer with identical
results.
> It
> > could be that It only happens on the two test computers I used and that
is
> why
> > RDCC would check this issue.
> >
> > The whole purpose of having a function that generates a random number is
> so that
> > you do not have to go through convolutions to get a random number. The
> > technique of using a date or time component to change the seed value of
> the
> > random number generator is something that the programmer of the random
> function
> > should have used so that when anyone using the random number generator
> function
> > would correctly generate a random number.
> > If you create a random number function that generate predictable
numbers,
> it is
> > NOT a random number generator function. The test I performed repeated
the
> > numbers EXACTLY every time you enter RBase.
> > For a user to have to add a seed value to a supposedly random number
> generator
> > function is at best a workaround for a defective function.
> > Manuel
> >
> > Jouke Hendrik de Vries wrote:
> >
> > > Why is this seen as a BUG?
> > > There is not a single product on the market who remembers earlier
values
> > > after the database has been closed and connected again.
> > > The only possible way is to load every obtained value in a table
(single
> > > column) that does not accept duplicates.
> > > (RANDOM(1000)) continues until a value is accepted
> > >
> > > SET ERR VAR verr
> > > WHILE #date IS NOT NULL THEN
> > > SET VAR vtest = (RANDOM(1000)
> > > LOAD RANDOMTAB
> > > .vtest
> > > END
> > > IF verr = 0 THE
> > > BREAK
> > > ENDI
> > > ENDW
> > >
> > > Another method is to use RANDOM in conjunction with values extracted
> from
> > > DATE and TIME variables, but even then you cannot quarantee a unique
> result.
> > >
> > > Jouke
> > >
> > > ----- Original Message -----
> > > From: Manuel de Aguiar <[EMAIL PROTECTED]>
> > > To: <[EMAIL PROTECTED]>
> > > Sent: Monday, April 23, 2001 6:51 PM
> > > Subject: Re: Randomly generated unique numbers - Razzak's Reply
> > >
> > > > Hello Rich,
> > > > I think you just found a bug.
> > > > Using RBase for Windows V6.5++ Build: 1.840gxRT03 I tried your
command
> > > line
> > > > verbatim seven time and got the following number:
> > > > 10
> > > > 3
> > > > 335
> > > > 33
> > > > 355
> > > > 217
> > > > 536
> > > > I then exit RBase, open RBase again SIX TIMES and got the same
> numbers.
> > > Since
> > > > you discover it, please report it to RDCC so that the Dream Team can
> > > correct
> > > > this problem.
> > > > Thank you,
> > > > Manuel de Aguiar
> > > > M|D Enterprises
> > > >
> > > > rich wrote:
> > > >
> > > > > One item to watch out for:
> > > > > 1. If you set a variable to a random number like: set var vrand =
> > > > > (random(1000)) it will generate a number.
> > > > > 2. if you exit rbase and restart it, define the variable again you
> will
> > > get
> > > > > the same random number.
> > > > >
> > > > > rich
> > > > > ----- Original Message -----
> > > > > From: "A. Razzak Memon" <[EMAIL PROTECTED]>
> > > > > To: <[EMAIL PROTECTED]>
> > > > > Sent: Monday, April 23, 2001 10:35 AM
> > > > > Subject: Re: Randomly generated unique numbers - Razzak's Reply
> > > > >
> > > > > >
> > > > > > Bob,
> > > > > >
> > > > > > Use the R:BASE (RANDOM(value)) Function!
> > > > > >
> > > > > > http://www.RSyntax.com
> > > > > >
> > > > > > Enjoy!
> > > > > >
> > > > > > Very Best Regards,
> > > > > >
> > > > > > Razzak.
> > > > > >
> > > > > > At 10:05 AM 4/23/2001 -0400, Bob Powell wrote:
> > > > > > >
> > > > > > >Does anyone know how to randomly generate a nine
> > > > > > >digit number that is always unique?
> > > > > >
> > > > > >
> > > > > > ===================================-============================
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> > > > > > Official R:BASE List Server: mailto:[EMAIL PROTECTED]
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> > > > > > R:DCC Members: http://www.rbase2000.com/rdcc
> > > > > > ================================================================
> > > > > > R:BASE, Oterro & R:Tango are registered trademarks of RBTI.
> > > > > > ==================================-=============================
> > > >
> >
>
