in reply to Re^5: parsing Win32::OLE::Variant
in thread parsing Win32::OLE::Variant

I realize that you are being very patient with me.

Here is some VBA code that gets the job done.

Sub testSubscribeC()
On Error GoTo Handler:

Dim oBlp As BLP_DATA_CTRLLib.BlpData
Dim ReqSecurities As Variant
Dim ReqFields As Variant
Dim vtResult As Variant
Dim n As Integer

Set oBlp = New BlpData
ReqSecurities = Array("VDE.A Equity")

ReqFields = Array("NAME", "ID_SEDOL1", "ID_CUSIP", "ID_ISIN", "ETF_UND
+L_INDEX_TICKER")

With oBlp
.SubscriptionMode = ByRequest
.Subscribe ReqSecurities, 3, ReqFields, , , vtResult
End With

Stop 'and look at the results in Local or Watch Window
For n = 0 To UBound(vtResult, 2)
Debug.Print n, vtResult(0, n)
Next

Handler:
If Err.Number <> 0 Then
MsgBox Err.Description, vbCritical
End If

Set oBlp = Nothing
End Sub

[download]
vtResult is two dimension array. As follows:
 2 
 0            VANGUARD ENERGY ETF
 1            B031N66
 2            92204A306
 3            US92204A3068
 4            MSCIEN

[download]
so what would this look like in Perl?
There has to be a way to get VBA out of my life.
Many thanks.

KD

Replies are listed 'Best First'.
Re^7: parsing Win32::OLE::Variant
by Corion (Patriarch) on Sep 27, 2008 at 06:07 UTC

    Looking again through Win32::OLE::Variant, it documents the access to arrays by using the ->Dim method to get at the bounds and by using the ->Get method to get at single array elements. So starting from your original code, which gets the results in $bbData, you should be able to get at the information through the following calls:

    ...
my $res = $blpData->Subscribe( $aSec,3, $aFields, $plug, $plug,  $bbDa
+ta);
warn "->Subscribe returns $res";

my @dimensions = $bbData->Dim();
warn "Dimensions are " . Dumper \@dimensions;

for my $x ($dimensions[0]->[0].. $dimensions[0]->[1]) {
    for my $y ($dimensions[1]->[0].. $dimensions[1]->[1]) {
        my $value = $bbData->Get($x, $y);
        print Dumper( $value ), ">$value<";
    };
}

    [download]

    If that doesn't work either, maybe the ->Subscribe call doesn't return values immediately and you need a different approach.

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      Hello:

      Again thanks for your patience on this issue.

      And I agree that the code you posted last should work. But it does not. However, taking another look at the Bloomberg documentation I found another function call that is simpler and does the same thing.

      This code works.
      use Data::Dumper;
use Win32::OLE;
use Win32::OLE::Variant;


$blpData = Win32::OLE->new('Bloomberg.Data.1')  or die "can NOT load t
+he blpData" ;

#print $blpData->Timeout   . "\n";


$aSec  =   Variant(VT_BSTR,  "VDE.A Equity");
     #@tmpArray  = ("PX_Last"); 
$aFields = Variant(VT_ARRAY|VT_BSTR, 5 );

$aFields->Put(0,"NAME") ; 
$aFields->Put(1,"ID_SEDOL1") ; 
$aFields->Put(2,"ID_CUSIP") ; 
$aFields->Put(3,"ID_ISIN") ; 
$aFields->Put(4,"ETF_UNDL_INDEX_TICKER") ; 

$bbData = Variant(VT_EMPTY,1) ;


$bbData = Variant(VT_EMPTY, 1);

$bbData = $blpData->BLPSubscribe($aSec, $aFields  );

print "Error: " . Win32::OLE->LastError  . "\n";
  #print "Array Size: " , $bbData->Dim . "\n";
  #print "Returned: " . $bbData->Get(0)  . "\n";
  print Dumper $bbData;

  for my $e (@$bbData)   {
     print Dumper $e;     
     
     my $d = @$e->[0]; 
     print "Col Zero: " . @$e->[0] . "  Col One: " . @$e->[1] . "  Col
+ Four: " . @$e->[4] . " \n" ;
     print "Col Zero: " . $d  . " \n" ;
   

     #foreach $tmp (@aDim) {
     #   print $tmp
     
  }

print  "end"  ;

      [download]
      It returns the following
      Using an array as a reference is deprecated at tstblpSubscribeIIg.pl l
+ine 37.
Using an array as a reference is deprecated at tstblpSubscribeIIg.pl l
+ine 39.
Using an array as a reference is deprecated at tstblpSubscribeIIg.pl l
+ine 39.
Using an array as a reference is deprecated at tstblpSubscribeIIg.pl l
+ine 39.
Error: 0
$VAR1 = [
          [
            'VANGUARD ENERGY ETF',
            'B031N66',
            '92204A306',
            'US92204A3068',
            'MSCIEN'
          ]
        ];
$VAR1 = [
          'VANGUARD ENERGY ETF',
          'B031N66',
          '92204A306',
          'US92204A3068',
          'MSCIEN'
        ];
Col Zero: VANGUARD ENERGY ETF  Col One: B031N66  Col Four: MSCIEN
end

      [download]
      However it has a minor issue. Using an array as a reference.
      I tried many variations of syntax to access the arrays returned. The @$e-> is the only one that worked. Hoping you would provide me with clean syntax to parse the results returned.

      thanks in advance.

      kd
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