Question

How to use a list of Func delegate in VB.NET

Answer 1

Imports System
Imports System.Linq
Imports System.Collections.Generic

Public Class Program
	Public Shared Sub Main()
        Dim arr = New Integer() {1, 2, 3, 4, 5, 6}
		
        Dim add1 As Func(Of Integer, Integer) = Function(x) x + 1
        Dim square As Func(Of Integer, Integer) = Function(x) x * x
        Dim cube As Func(Of Integer, Integer) = Function(x) x * x * x
					
        Dim functions = New List(Of Func(Of Integer, Integer)) From {
            add1,
            square,
            cube
        }

        For Each fn In functions
            Dim result = arr.Select(fn)
            Console.WriteLine(String.Join(" ", result))
        Next
    End Sub
End Class






' run:
'
' 2 3 4 5 6 7
' 1 4 9 16 25 36
' 1 8 27 64 125 216
'

 

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