VB.NET 9.0: Lambda Expression

VB.NET 9.0: Lambda Expression

  • Comments 5

In VB.NET 9.0 Lambda is one of the features we have here. Lambda expression is just another way to call Anonymous method/delegate.

 

Let’s look into a generic list of integers, and play with it,

 

Dim arrInt As New List(Of Integer)

 

For i As Integer = 1 To 10

    arrInt.Add(i)

Next

 

When you need to get the even numbers out of this List, you can call delegate,

 

Dim even1 As New List(Of Integer)

 

even1 = arrInt.FindAll(New Predicate(Of Integer)(AddressOf EvenGetter))

 

Then for this approach you need a method,

 

Public Function EvenGetter(ByVal i2 As Integer) As Boolean

    Return i2 Mod 2 = 0

End Function

 

Using VB.NET 9.0 you can also implement Lambda Expression,

 

even1 = arrInt.FindAll(Function(i2 As Integer) i2 Mod 2 = 0)

 

Ask expert for more.

 

Namoskar!!!

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  • In VB.NET 9.0 Lambda is one of the features we have here. Lambda expression is just another way to call

  • Thanks.  Was trying to figure out the syntax for lambda expression in vb.net as i'm a c# guy.

  • Nice,

    How do I convert thefollowing c# code to VB.Net using Lambda Expression:

    synchronizationContext.Post((e) => action((T)e), eventArgs);

    THanks

    Atallah

  • synchronizationContext.Post((Function(e as T) action(e)), eventArgs)

  • Very Good! Thanks you very much!

    Now I understand on 'Lambda' clearly.

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