perhaps the method offers a numerical
solution for unique identification (as
opposed to the hex identifier returned
by CreateUUID())?
--> scott van vliet
<-- senior web engingeer
juxt interactive
949<>752<>5898<>202
[EMAIL PROTECTED]
www.juxtinteractive.com
"In uniqueness is the preservation
of mankind..." - Greg Graffin
-----Original Message-----
From: Ken Beard [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 05, 2001 3:50 PM
To: Fusebox
Subject: RE: Unique Random Numbers
is there a problem with the createUUID() function in cf?
At 11:33 AM 6/5/01 -0700, you wrote:
>For you uniqueness freaks out there, combine GetTickCount() with the tips
>below for a super-guaranteed random number.
>
>NAT
>
> > -----Original Message-----
> > From: Matthew J. Vecera [mailto:[EMAIL PROTECTED]]
> > Sent: Tuesday, June 05, 2001 9:00 AM
> > To: Fusebox
> > Subject: Unique Random Numbers
> >
> >
> > I feel a little amateurish dishing this one up - but I really dig this
> > little technique. Somehow it satisfies my skepticism of Unique Key
> > Generators -- and it keeps things numeric.
> >
> > Matthew
> >
> > http://www.builder.com/Programming/ScriptMagic/ss01g.html
> >
> > ColdFusion Tips
> > Generate Unique Random Numbers
> >
> > By Rob Bilson and Mike Van Hoozer
> > (6/30/98)
> >
> > ColdFusion's RAND, RANDRANGE, and RANDOMIZE functions can be used to
> > generate random numbers, but none of them
> > addresses the need for generating unique random numbers. Unique
random
> > numbers have many uses, especially in user
> > authentication and identification. One of the easiest ways to create
a
> > unique random number in ColdFusion is to combine the
> > RAND function with a time and date stamp.
> >
> > Using the time and date stamp ensures that even if the same random
> > numbers are generated--and you have a better chance of
> > winning the lottery than of seeing that happen--the time and
> > date stamp
> > will be different:
> >
> > <!--- Assign the current date and time to a variable. --->
> > <CFSET tdstamp="#DateFormat(Now(),'mmddyyyy')
> > ##TimeFormat(Now(),'hhmmss')#">
> > <!--- Create a random number. --->
> > <CFSET randomnum1=RAND()*100000000>
> > <!--- Create another random number. --->
> > <CFSET randomnum2=RAND()*100000000>
> > <!--- Concatenate the first random number, the time and date
> > stamp, and
> > the second random number. --->
> > <CFSET uniquenumber="#randomnum1##tdstamp
> > ##randomnum2#">
> >
> > <!--- Output the unique random number. --->
> > <CFOUTPUT>
> > Unique Random Number: #UniqueNumber#
> > </CFOUTPUT>
> >
> >
> > Archives: http://www.mail-archive.com/[email protected]/
> > Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
>
>
>
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