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'**********************************************************************************************************
' Name: isDefinedArray
' Author: mielk | 2012-03-27
'
' Description: Function to check if the given parameter is an array with dimensions and sizes already
' declared.
'
' Parameters:
' arr Parameter to be tested.
'
' Returns:
' Boolean True - if parameter [arr] is an array and its dimensions and sizes has been already
' defined.
' False - if parameter [arr] is not an array or it is declared as a dynamic array but its
' dimension and size have not been defined yet.
'
' --- Changes log -----------------------------------------------------------------------------------------
' 2012-03-27 mielk Function created.
' 2014-08-10 mielk Case about arrays with negative up bound instead of being not declared.
'**********************************************************************************************************
Public Function isDefinedArray(arr As Variant) As Boolean
Const METHOD_NAME As String = "isDefinedArray"
'------------------------------------------------------------------------------------------------------
Dim upBound As Long
Dim lowBound As Long
'------------------------------------------------------------------------------------------------------
'Try to assign bottom and top bound of the given parameter.
'If it is not an array or is not declared yet, code will move to
'the label NotArrayException and function will return False.
On Error GoTo NotArrayException
upBound = UBound(arr, 1)
lowBound = LBound(arr, 1)
'In some cases, it is possible to get LBound and UBound of a dynamic array
'althought it is not declared yet (i.e. arrays returned as a result of VBA
'built-in Split function if empty string is passed as a parameter),
'however in this case UBound will be lower than LBound.
isDefinedArray = (upBound >= lowBound)
'==========================================================================================================
ExitPoint:
Exit Function
'----------------------------------------------------------------------------------------------------------
NotArrayException:
GoTo ExitPoint
End Function