RE: Generating unique values

2001-01-02 Thread JustinMacCarthy 

While this is true in your case , it depends on the machine being used etc.

GUIDs are created using a complicated algorithm which take several factors
into consideration. Sometimes this results in consecutive UUID (Guids) being
1 apart, other times it doesn't. It depends on the resource etc. etc.
For example if the GUID function drops its counter it has to start again at
a point that is definitely past the last one it generated.

Justin MacCarthy

>-Original Message-
>From: C Frederic Valone [mailto:[EMAIL PROTECTED]]
>Sent: Tuesday, January 02, 2001 3:51 PM
>To: CF-Talk
>Subject: Re: Generating unique values
>
>
>> I just checked this out by generating a loop of 50 uuid's and
>found that none of the values are incremented  by 1 they differ in
>various ways although the last portion of the id is the same in all cases.
>
>> Here is the list that was generated
>
>00075D9C-F809-1A51-B7D6809AFF5FEEB7
>00075E16-F809-1A51-B7D6809AFF5FEEB7
>00075E7D-F809-1A51-B7D6809AFF5FEEB7

>0007B5EE-F809-1A51-B7D6809AFF5FEEB7
>0007B64F-F809-1A51-B7D6809AFF5FEEB7
>
>>
>>
>> Tuesday, January 02, 2001, 6:15:41 AM, you wrote:
>>
>> J> But it doesn't create values which are not easy to guess.
>>
>> J> Two consecutive UUID will have similar values + 1
>>
>> J> Justin


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RE: Generating unique values

2001-01-02 Thread Neil Clark 

Erm, isnt this to do with the fact that the id's are taken from a
combination of your NIC ID and your system clock?  The fact that the
template would have been processed in such a fraction of a second could be
the answer.

Just a thought.

N


http://www.mcbdigital.com
--->



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Re: Generating unique values

2001-01-02 Thread C Frederic Valone 

> I just checked this out by generating a loop of 50 uuid's and found that none of the 
>values are incremented  by 1 they differ in various ways although the last portion of 
>the id is the same in all cases.

> Here is the list that was generated

00075D9C-F809-1A51-B7D6809AFF5FEEB7
00075E16-F809-1A51-B7D6809AFF5FEEB7
00075E7D-F809-1A51-B7D6809AFF5FEEB7
00075EE1-F809-1A51-B7D6809AFF5FEEB7
00075F44-F809-1A51-B7D6809AFF5FEEB7
00075FA6-F809-1A51-B7D6809AFF5FEEB7
00076009-F809-1A51-B7D6809AFF5FEEB7
0007606B-F809-1A51-B7D6809AFF5FEEB7
000760CD-F809-1A51-B7D6809AFF5FEEB7
00076130-F809-1A51-B7D6809AFF5FEEB7
00076192-F809-1A51-B7D6809AFF5FEEB7
000761F4-F809-1A51-B7D6809AFF5FEEB7
00076257-F809-1A51-B7D6809AFF5FEEB7
000762B9-F809-1A51-B7D6809AFF5FEEB7
0007631B-F809-1A51-B7D6809AFF5FEEB7
0007637D-F809-1A51-B7D6809AFF5FEEB7
000763DF-F809-1A51-B7D6809AFF5FEEB7
00076441-F809-1A51-B7D6809AFF5FEEB7
000764A3-F809-1A51-B7D6809AFF5FEEB7
00076505-F809-1A51-B7D6809AFF5FEEB7
00076567-F809-1A51-B7D6809AFF5FEEB7
000765C9-F809-1A51-B7D6809AFF5FEEB7
0007662B-F809-1A51-B7D6809AFF5FEEB7
0007668C-F809-1A51-B7D6809AFF5FEEB7
000766EE-F809-1A51-B7D6809AFF5FEEB7
00076750-F809-1A51-B7D6809AFF5FEEB7
000767B2-F809-1A51-B7D6809AFF5FEEB7
00076815-F809-1A51-B7D6809AFF5FEEB7
00076877-F809-1A51-B7D6809AFF5FEEB7
000768D9-F809-1A51-B7D6809AFF5FEEB7
0007693B-F809-1A51-B7D6809AFF5FEEB7
000769A0-F809-1A51-B7D6809AFF5FEEB7
00076A04-F809-1A51-B7D6809AFF5FEEB7
00076A66-F809-1A51-B7D6809AFF5FEEB7
0007B06A-F809-1A51-B7D6809AFF5FEEB7
0007B0EE-F809-1A51-B7D6809AFF5FEEB7
0007B156-F809-1A51-B7D6809AFF5FEEB7
0007B1BB-F809-1A51-B7D6809AFF5FEEB7
0007B21D-F809-1A51-B7D6809AFF5FEEB7
0007B27E-F809-1A51-B7D6809AFF5FEEB7
0007B2E0-F809-1A51-B7D6809AFF5FEEB7
0007B342-F809-1A51-B7D6809AFF5FEEB7
0007B3A3-F809-1A51-B7D6809AFF5FEEB7
0007B405-F809-1A51-B7D6809AFF5FEEB7
0007B467-F809-1A51-B7D6809AFF5FEEB7
0007B4C8-F809-1A51-B7D6809AFF5FEEB7
0007B52A-F809-1A51-B7D6809AFF5FEEB7
0007B58C-F809-1A51-B7D6809AFF5FEEB7
0007B5EE-F809-1A51-B7D6809AFF5FEEB7
0007B64F-F809-1A51-B7D6809AFF5FEEB7

>
>
> Tuesday, January 02, 2001, 6:15:41 AM, you wrote:
>
> J> But it doesn't create values which are not easy to guess.
>
> J> Two consecutive UUID will have similar values + 1
>
> J> Justin
>
> >>-Original Message-
> >>From: listmb [mailto:[EMAIL PROTECTED]]
> >>Sent: Sunday, December 31, 2000 10:01 PM
> >>To: CF-Talk
> >>Subject: Re[2]: Generating unique values
> >>
> >>
> >>Thanks Nick,
> >>
> >>That was just what I was looking for!
> >>
> >>Best,
> >>WayGee
> >>
> >>
> >>Hello Nick,
> >>
> >>Sunday, December 31, 2000, 4:00:40 PM, you wrote:
> >>
> >>NM> You can use the CreateUUID function.
> >>
> >>NM> It generates a Universally Unique ID. It does contain both
> >>letters and numbers.
> >>
> >>NM> At 03:58 PM 12/31/2000 -0500, you wrote:
> Hi,
> 
> Being new to cold fusion (1 week),  can anyone let me know if there is
> a way to create unique random numbers or strings in cold fusion?
> It should not be iterative or easily guessed.
> 
> 
> This would help alot!
> 
> --
> Best regards,
> WayGee  mailto:[EMAIL PROTECTED]
> 
> 
> 
> 
> >>NM>
> >>
> J>
>
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Re: Generating unique values

2000-12-31 Thread Nick McClure 

You can use the CreateUUID function.

It generates a Universally Unique ID. It does contain both letters and numbers.

At 03:58 PM 12/31/2000 -0500, you wrote:
>Hi,
>
>Being new to cold fusion (1 week),  can anyone let me know if there is
>a way to create unique random numbers or strings in cold fusion?
>It should not be iterative or easily guessed.
>
>
>This would help alot!
>
>--
>Best regards,
>WayGee  mailto:[EMAIL PROTECTED]
>
>
>
>
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