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Array Problem
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21/08/2013 12:20:57
 
 
À
21/08/2013 10:30:45
Mike Yearwood
Toronto, Ontario, Canada
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Titre:
Versions des environnements
Visual FoxPro:
VFP 9 SP1
OS:
Windows XP SP3
Network:
Windows 2003 Server
Database:
Visual FoxPro
Application:
Desktop
Divers
Thread ID:
01580886
Message ID:
01580904
Vues:
69
>>Hi Gang!
>>
>>My fellow colleague at work has this problem. He has this in some code
>>
>>
>>PROCEDURE getArrayElement
>>      PARAMETERS lnElement
>>      pcTheData = laWarnLbl[lnElement]
>>      RETURN pcTheData
>>ENDPROC
>>
>>
>>The above snippet of code is giving me the “invalid subscript reference” error on the “pcTheData = laWarnLbl[lnElement] line.
>>
>>The value of lnElement at this point is 1.
>>
>>And laWrnLbl is dimensioned to 6.
>>
>>Thanks
>
>If you have a field called lnElement in the active table, and it has a value greater than 6, you will get this error. I strongly advise you to alter this routine so that it uses LPARAMETERS. It should receive the array as a parameter too. It should declare pcTheData LOCAL or not even use pcTheData at all. I'd write it this way.
>
>
getArrayElement.prg
>LPARAMETERS lnElement,taArray
>EXTERNAL ARRAY taArray && prevents compiler error.
>RETURN taArray[m.lnElement]
>
>and I'd call it like this
>
?GetArrayElement(5,@laWarnLbl)
This will probably answer Dimitry's question, but I have another question - why call a one-line procedure?
Anyone who does not go overboard- deserves to.
Malcolm Forbes, Sr.
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