The Weird and The Wonderful

Public Class Form1

    Private small As String = "a"
    Private large As String = "This was a really long string I shortened so I could paste it here easily..."
    Private Const MAX As Integer = 9999999
    Private startTime As DateTime
    Private endTime As DateTime
    Private smallDuration As Integer
    Private largeDuration As Integer
    Dim sb As System.Text.StringBuilder

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        sb = New System.Text.StringBuilder()
        GC.Collect()
        GC.WaitForPendingFinalizers()
        startTime = DateTime.Now
        For i As Integer = 0 To MAX
            sb.Append(FirstChar(large))
        Next
        endTime = DateTime.Now
        largeDuration = CInt(endTime.Subtract(startTime).TotalMilliseconds)


        sb = New System.Text.StringBuilder()
        GC.Collect()
        GC.WaitForPendingFinalizers()
        startTime = DateTime.Now
        For i As Integer = 0 To MAX
            sb.Append(FirstChar(small))
        Next
        endTime = DateTime.Now
        smallDuration = CInt(endTime.Subtract(startTime).TotalMilliseconds)


        MessageBox.Show(String.Format("Small: {0}, Large: {1}", smallDuration.ToString(), largeDuration.ToString()))

    End Sub

    ' TODO: Try ByRef and ByVal, and compare them.
    Private Function FirstChar(ByRef str As String) As String
        Return str.Substring(0, 1)
    End Function

End Class

public static bool IsNullOrEmpty(string str)
{
    return str == null || str == "";
}

Marcus Kramer wrote:

But do you want to write the entire "if" statement in hundreds of places in a large solution, or one that can be issued a test-case for coverage and validation that will then be validated from intellisense. Any equality statement is dangerous in the old "str = null" vs "str == null" world and thus should be encapsulated into a testable case.

return lst == null || lst.Count == 0;

aaaAccessor Instrument;
bbbInstrument Accessor;
cccAccessor instrument;
dddInstrument accessor;

Instrument = instrument.Accessor;
Accessor = GetAccessorForInstrument(instrument.Accessor);
Accessor.Instrument = instrument.Accessor;