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A function to determine variable type

therks

By therks
in AutoIt Example Scripts

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Richard Robertson Universalist

Richard Robertson

Posted
Posted

Found one, but I had to modify your code just a little bit.

MsgBox(0, '', _VarDump(0, '', True))

Func _VarDump(ByRef $vVar, $sIndent = '', $IsSupposedToBeUnknown = False)
    Select
        Case $IsSupposedToBeUnknown
            Return 'Unknown(' & $vVar & ')'
        Case IsDllStruct($vVar)
            Return 'Struct(' & DllStructGetSize($vVar) & ')'
        Case IsArray($vVar)
            Return 'Array' & @CRLF & _VarDumpArray($vVar, $sIndent)
        Case IsBinary($vVar)
            Return 'Binary(' & BinaryLen($vVar) & ')'
        Case IsBool($vVar)
            Return 'Boolean(' & $vVar & ')'
        Case IsFloat($vVar)
            Return 'Float(' & $vVar & ')'
        Case IsHWnd($vVar)
            Return 'HWnd(' & $vVar & ')'
        Case IsInt($vVar)
            Return 'Integer(' & $vVar & ')'
        Case IsKeyword($vVar)
            Return 'Keyword(' & $vVar & ')'
        Case IsObj($vVar)
            Return 'Object(' & ObjName($vVar) & ')'
        Case IsString($vVar)
            Return 'String(' & StringLen($vVar) & ') ' & $vVar
        Case Else
            Return 'Unknown(' & $vVar & ')'
    EndSelect
EndFunc
Achilles Universalist

Achilles

Posted
Posted

Found one, but I had to modify your code just a little bit.

MsgBox(0, '', _VarDump(0, '', True))

Func _VarDump(ByRef $vVar, $sIndent = '', $IsSupposedToBeUnknown = False)
    Select
        Case $IsSupposedToBeUnknown
            Return 'Unknown(' & $vVar & ')'
        Case IsDllStruct($vVar)
            Return 'Struct(' & DllStructGetSize($vVar) & ')'
        Case IsArray($vVar)
            Return 'Array' & @CRLF & _VarDumpArray($vVar, $sIndent)
        Case IsBinary($vVar)
            Return 'Binary(' & BinaryLen($vVar) & ')'
        Case IsBool($vVar)
            Return 'Boolean(' & $vVar & ')'
        Case IsFloat($vVar)
            Return 'Float(' & $vVar & ')'
        Case IsHWnd($vVar)
            Return 'HWnd(' & $vVar & ')'
        Case IsInt($vVar)
            Return 'Integer(' & $vVar & ')'
        Case IsKeyword($vVar)
            Return 'Keyword(' & $vVar & ')'
        Case IsObj($vVar)
            Return 'Object(' & ObjName($vVar) & ')'
        Case IsString($vVar)
            Return 'String(' & StringLen($vVar) & ') ' & $vVar
        Case Else
            Return 'Unknown(' & $vVar & ')'
    EndSelect
EndFunc
Am I missing something or did you just modify his code so that it shows you that a variable is unknown if you put the third argument as true? That seems utterly pointless to me...
My Programs[list][*]Knight Media Player[*]Multiple Desktops[*]Daily Comics[*]Journal[/list]
Nutster Universalist

Nutster

Posted
Posted

It's pretty, but what kind of variable would be unknown?

The one you are calling a UDF with, so you need to check it. You want to make sure you can display it/process it properly. Particularly true for array dumps.

David Nuttall
Nuttall Computer Consulting

An Aquarius born during the Age of Aquarius

AutoIt allows me to re-invent the wheel so much faster.

I'm off to write a wizard, a wonderful wizard of odd...

JRSmile Universalist

JRSmile

Posted
Posted

this is far mostly the most usable function i will ever use since ConsoleWrite ...

BIG THX...

$a=StringSplit("547275737420796F757220546563686E6F6C75737421","")
For $b=1 To UBound($a)+(-1*-1*-1)step(2^4/8);&$b+=1*2/40*µ&Asc(4)
Assign("c",Eval("c")&Chr(Dec($a[$b]&$a[$b+1])));''Chr("a")&"HI"
Next ;time_U&r34d,ths,U-may=get$the&c.l.u.e;b3st-regards,JRSmile;
MsgBox(0x000000,"",Eval("c"));PiEs:d0nt+*b3.s4d.4ft3r.1st-try:-)
therks Universalist

therks

Posted
  • Author
Posted (edited)

Whooooaaa. I got moved! Haha I guess the example forum is more appropriate now anyway. I've been playing with this a bit more, adding some comments. I also added a _VarDumpNotByRef(), it's basically a wrapper for _VarDump() but, as the title implies, takes the variable not by reference. Using ByRef you're stuck with dumping variables only. For example, I recently was working with a COM object for Winamp, and had this piece of code:

$oWinamp = ObjGet('', 'ActiveWinamp.Application')
If IsObj($oWinamp) Then
    ConsoleWrite(_VarDump($oWinamp.PlayList.GetSelection) & @CRLF)
EndIf

Which threw me this error:

D:\Rob\Desktop\Miniamp\Copy of Miniamp.au3 (8) : ==> Error parsing function call.: 
ConsoleWrite(_VarDump($oWinamp.PlayList.GetSelection) & @CRLF) 
ConsoleWrite(_VarDump($oWinamp^ ERROR

So I created this function:

Func _VarDumpNotByRef($vVar)
    Return _VarDump($vVar)
EndFunc

Which easily bypasses the error. If I submit this for official inclusion (although I don't know that it would make the cut) should I include this wrapper function as well? Or maybe go vice versa and rename the current _VarDump() to _VarDumpByRef() and have _VarDump() be a non-byref compatible function?

*Edit: On a slightly related side note, that piece of code I used as an example gives me an array of the items selected in Winamp's playlist, and when there was nothing selected the function returned this:

Array(
0
)

Weird huh? I looked into it and when there's nothing selected it does indeed return an array... a completely empty array! I even used UBound to check how many subscripts it had, and it returned 0! I wonder how often that comes up, considering we can't even make a completely empty array ourselves (what would be the point anyway?). Scrap that, I made a mistake. Still trying to figure it out though.

Edited by Saunders

My AutoIt Stuff | My Github

therks Universalist

therks

Posted
  • Author
Posted (edited)

Okay, figured it out.. kinda.

$oWinamp = ObjGet('', 'ActiveWinamp.Application')
If IsObj($oWinamp) Then
    $aSel = $oWinamp.PlayList.GetSelection
    ConsoleWrite(IsArray($aSel) & @CRLF)
    ConsoleWrite(UBound($aSel, 0) & @CRLF)
    ConsoleWrite(UBound($aSel, 1) & @CRLF)
EndIf

Returned:

1

1

0

To get that normally you'd basically have to Dim $array[0] and we can't even do that, not that we have a reason to.

*Edit: I'm just going to have the dumper function return an error string when something like that happens. So now the dump on that variable looks like this:

Array(
    [0] !! Error reading index
)
Edited by Saunders

My AutoIt Stuff | My Github

  • 5 years later...
Beamer145 Seeker

Beamer145

Posted
Posted

In case anyone else ends up in this thread looking for a method to determine the variable type: the _VarDump method should not be used, use VarGetType() instead. See for a discussion on this topic.

jchd Universalist

jchd

Posted
Posted

I've posted what I believe is a correct version in the thread mentionned. It needs the beta for Null support BTW.

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