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Unique key
Message
De
30/10/2010 16:14:45
 
 
À
30/10/2010 15:55:11
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Titre:
Versions des environnements
Visual FoxPro:
VFP 9 SP2
OS:
Windows XP SP1
Divers
Thread ID:
01487630
Message ID:
01487647
Vues:
62
Al, thank you!

I had looked at
oGUID = CreateObject("scriptlet.typelib")
cGUID = substr( oGUID.GUID, 2, 36 )
? cGUID
but wanted a shorter key that I could also use as a filename.

dg

>You may want to look at GUIDs for this sort of thing: http://fox.wikis.com/wc.dll?Wiki~GUIDGenerationCode~VFP
>
>>Thank you. I want to be able to order this key by chronology, so do I understand that
>>
SUBSTR(SYS(2015),2, 9)+TRANSFORM(_vfp.ProcessId)
>>would yield unique id's created on different machines at the precise same moment?
>>
>>dg
>>
>>
>>
>>>Adding ProcessId to should make the key unique
>>>
>>>transform(_vfp.ProcessId)+SYS(2015) 
>>>
>>>>I am creating a unique key with substr(SYS(2015),2, 9) as the value. Would it require that 2 users on 2 machines create the key at the same millisecond to get a duplicate, or even at the precise same moment would different machines render different values?
>>>>
>>>>Thanks.
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