Last and Except operator in LINQ using VB.NET
Here we will see how to use Last and Except Operator in Linq.
Last operator
The Last operator returns the last element from a sequence.
To find last element from a sequence
Dim numbers As Integer() = {1, 2, 3, 4, 5}
Dim last As Integer = numbers.Last()
To find last element with the condition
Dim numbers As Integer() = {1, 2, 3, 4, 5}
Dim lastEven As Integer = numbers.Last(Function(n) n Mod 2 = 0
For example
This example defines the last operator in LinQ.
Module Module1
Sub Main()
Dim numbers As Integer() = {1, 2, 3, 4, 5}
Dim last As Integer = numbers.Last()
Dim lastEven As Integer = numbers.Last(Function(n) n Mod 2 = 0)
Console.WriteLine(last)
Console.WriteLine(lastEven)
End Sub
End Module
OUTPUT
Except operator
The Except operator produces the set difference between two sequences. It will only return elements in the first sequence that don't appear in the second.
For example
Module Module1
Sub Main()
Dim s1 As Integer() = {1, 2, 3, 4, 5, 6}
Dim s2 As Integer() = {3, 4, 5, 6, 7, 8}
Dim difference1 As IEnumerable(Of Integer) = s1.Except(s2)
Dim difference2 As IEnumerable(Of Integer) = s2.Except(s1)
For Each i As Integer In difference1
Console.WriteLine(i)
Next
For Each i As Integer In difference2
Console.WriteLine(i)
Next
End Sub
End Module
OUTPUT
