Question

How to find the minimum index of a repeating element in an array with VB.NET

Answer 1

Imports System
Imports System.Collections.Generic

Public Class Program
    Public Shared Function findMininimumIndex(ByVal arr As Integer()) As Integer
        Dim minIndex As Integer = -1
		
		Dim st As ISet(Of Integer) = New HashSet(Of Integer)()

		For i As Integer = arr.Length - 1 To 0 step -1
			If st.Contains(arr(i)) Then
                minIndex = i
            Else
				st.Add(arr(i))
            End If
        Next

        Return minIndex
    End Function

    Public Shared Sub Main(ByVal args As String())
        Dim arr As Integer() = New Integer() {3, 7, 8, 6, 9, 1, 8, 8, 6, 1, 1, 8}
	
        Console.Write(findMininimumIndex(arr))
    End Sub
End Class

 

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