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>
>
>
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