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Sys(3) and sys(2015)
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À
10/11/2011 13:46:48
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Versions des environnements
Visual FoxPro:
VFP 9 SP2
OS:
Windows 7
Network:
Windows 2003 Server
Database:
MS SQL Server
Divers
Thread ID:
01528576
Message ID:
01528581
Vues:
55
>>Hi everybody,
>>
>>I see that we're using sys(3) in one place which may return non-unique numbers. Does sys(2015) have the same problem?
>>
>>Say, I see this comment in Help
>>
>>Remarks
>>Use SYS(2015) to create unique names for items such as procedures, functions, files, tables or cursors. You can add a prefix or change the length of the name using the SUBSTR( ) function. For example, the code "tmp"+SUBSTR(SYS(2015),4,3) returns tmpCIOS.
>>
>>The name that SYS(2015) returns is created from the system date and system time. Calling SYS(2015) more than once during the same millisecond interval returns a unique character string.
>>
>>So, can I 100% trust sys(2015)?
>>
>>Thanks in advance.
>
>Tried the following code:
>
>
lbPass = .T.
>lcLast = ""
>FOR lnTry = 1 TO 100000
>    lcNow = SUBSTR(SYS(2015),3,10)
>    IF m.lcLast==m.lcNow THEN
>        ? "Fail at "+TRANSFORM(m.lnTry)+" try."
>        lbPass = .F.
>    ENDIF
>    lcLast = m.lcNow
>ENDFOR
>IF m.lbPass THEN
>    ? "Passed"
>END
>
>it displayed "Passed"

If instead of sys(2015) the sys(3) is used and generates problems in Citrix environment on the
copy memo .. to (lcFile)

command

do you think switching to sys(2015) will work?
If it's not broken, fix it until it is.


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