Gert Gert - 7 months ago 15
Vb.net Question

Passing a constant array to a function in VB.NET

I know that you can easily pass an array to a function, like the code below shows

Private Sub SomeFunction(ByVal PassedArray() As String)
For i As Integer = 0 To PassedArray.Count - 1
Debug.WriteLine(PassedArray(i))
Next
End Sub

Public Sub Test()
Dim MyArray As String() = {"some", "array", "members"}

SomeFunction(MyArray)
End Sub


But is there a way to pass a constant array to a function in VB.NET?

For instance in PHP, you could write:

function SomeFunction($array)
{
for($i=0;$i<count($array);$i++)
{
echo($array[$i]);
}
}

function Test()
{
SomeFunction(array("some", "array", "members")); // Works for PHP
}


So to reiterate: Is there a way to pass a constant array directly to a function in VB.NET? Is there any benefit in doing so? I imagine a few bytes of memory could be spared.

PS.:

SomeFunction({"some", "array", "member"}) ' This obviously gives a syntax error

Answer

Another thing I just thought of that doesn't directly answer the question, but perhaps gets at the poster's intent - the ParamArray keyword. If you control the function you are calling into, this can make life a whole lot easier.

Public Function MyFunction(ByVal ParamArray p as String())
   ' p is a normal array in here
End Function

' This is a valid call
MyFunction(New String() {"a", "b", "c", "d"})

' So is this
MyFunction("a", "b", "c", "d")