BitArray.Not Method ()


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Inverts all the bit values in the current BitArray, so that elements set to true are changed to false, and elements set to false are changed to true.

Namespace:   System.Collections
Assembly:  mscorlib (in mscorlib.dll)

Public Function Not As BitArray

Return Value

Type: System.Collections.BitArray

The current instance with inverted bit values.

This method is an O(n) operation, where n is Count.

The following code example shows how to apply NOT to a BitArray.

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Public Class SamplesBitArray    

    Public Shared Sub Main()

        ' Creates and initializes two BitArrays of the same size.
        Dim myBA1 As New BitArray(4)
        Dim myBA2 As New BitArray(4)
        myBA1(0) = False
        myBA1(1) = False
        myBA1(2) = True
        myBA1(3) = True
        myBA2(0) = False
        myBA2(2) = False
        myBA2(1) = True
        myBA2(3) = True

        ' Performs a bitwise NOT operation between BitArray instances of the same size.
        Console.WriteLine("Initial values")
        PrintValues(myBA1, 8)
        PrintValues(myBA2, 8)


        Console.WriteLine("After NOT")
        PrintValues(myBA1, 8)
        PrintValues(myBA2, 8)
    End Sub    

    Public Shared Sub PrintValues(myList As IEnumerable, myWidth As Integer)
        Dim i As Integer = myWidth
        Dim obj As [Object]
        For Each obj In  myList
            If i <= 0 Then
                i = myWidth
            End If
            i -= 1
            Console.Write("{0,8}", obj)
        Next obj
    End Sub 'PrintValues

End Class

' This code produces the following output.
' Initial values
' myBA1:    False    False    True    True
' myBA2:    False    True    False    True
' After NOT
' myBA1:    True    True    False    False
' myBA2:    True    False    True    False 

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Return to top