Check for Nothing in vbscript/classic asp

Question

I need to update an old classic asp, and I have to call a function that normally returns an array, but under certain circumstances might return either Nothing or an undefined value.

How can I check that the result actually returns an array?

score 5 · Answer 1 · answered Apr 22 '09 at 14:45

5

er... I could be wrong, but isn't it just something like

If something Is Nothing Then
   'Do something here
Else
   'Do what I used to
End If

answered Apr 22 '09 at 14:45

Powerlord

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score 4 · Accepted Answer · answered Apr 22 '09 at 14:45

4

Is the function late bound / has a Variant return value? If so, the IsArray function will check whether it contains an array type.

answered Apr 22 '09 at 14:45

Konrad Rudolph

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score 2 · Answer 3 · answered Jun 16 '11 at 10:48

2

If TypeName(something) = "Empty" Then ...

answered Jun 16 '11 at 10:48

Anonymous

21
1

It needs to test agains "Nothing" and not "Empty" – Ricardo Souza Apr 19 '15 at 20:25

score 2 · Answer 4 · answered Apr 22 '09 at 14:45

2

IsNull() should work I think.

answered Apr 22 '09 at 14:45

John M Gant

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It needs to check for Nothing and not Null. Null and Nothing are totaly different values. – Ricardo Souza Apr 19 '15 at 20:26

score 0 · Answer 5 · answered Jul 13 '17 at 00:46

0

Ugly, but functional!

Function IsNothingType( ByRef obj )
    If TypeName(obj) = "Nothing" Then
        IsNothingType = True
    Else
        IsNothingType = False
    End If  
End Function

answered Jul 13 '17 at 00:46

BuvinJ

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score -1 · Answer 6 · answered Apr 11 '10 at 20:10

-1

If you are using VBScript/WSH then you may want to try the "typeof" function/method. It worked for me while the above did not.

answered Apr 11 '10 at 20:10

user314065

1

`typeof` doesn't exists in VBScript. – Ricardo Souza Apr 19 '15 at 20:24

Check for Nothing in vbscript/classic asp

6 Answers6