## Operator.GetNumInstancesInGroup

### Introduced

v3.0

### Description

Returns the number of instances in a PortGroup (or -1 if there is a failure).

### C# Syntax

    Int32 Operator.GetNumInstancesInGroup( Int32 in_lPortGroupIndex );

### Scripting Syntax

    oLong = Operator.GetNumInstancesInGroup( PortGroupIndex );

### Return Value

Long

### Parameters

Parameter | Type | Description
--- | --- | ---
PortGroupIndex | Long | Port.GroupIndex

### Examples

#### JScript Example

    /*
            This example illustrates how to get the number of instances within operator's
            port groups.
    */
    NewScene( null, false );
    var arc = CreatePrim( "Arc", "NurbsCurve" );
    // Duplicate arc 3 times and translate in z by 45
    var args = new Array(19);
    args[0] = arc;                                       // source object
    args[1] = 3;                                         // number of copies
    args[9] = siApplyRepeatXForm;                        // Xform
    args[15] = 90;                                       // Rz
    var arcs = Application.ExecuteScriptCommand( "Duplicate", args );
    // Create mesh from curves
    ApplyOp( "CrvNet", arc +","+arcs(1)+";"+arcs(0)+","+arcs(2) );
    // Get mesh from selection
    var mesh = Selection(0);
    // Get boolean operator from cube's construction history
    var e = new Enumerator( mesh.ActivePrimitive.ConstructionHistory );
    var op;
    for ( ; !e.atEnd(); e.moveNext() )
    if ( e.item().Type == "curvenet" )
    {
    op = e.item();
    break;
    }
    // Print the number of ports in each group
    Application.LogMessage( op.Name + ": num port groups = " + op.GetNumPortGroups() );
    for ( var i=0; i<op.GetNumPortGroups(); i++ )
    Application.LogMessage( op.Name + ": num instances in group " + i + " = " + op.GetNumInstancesInGroup(i) );
    //INFO : "Curve Net: num port groups = 3"
    //INFO : "Curve Net: num instances in group 0 = 2"
    //INFO : "Curve Net: num instances in group 1 = 2"
    //INFO : "Curve Net: num instances in group 2 = 1"