Sort two arrays with corresponded indexes

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Dear All,

I have two arrays (array1 and array2)with double type data. I want to sort array1 to ascending order, and array2 with corresponding to the array1 indexes. Is this possible? Example below,

Array1(0) = 2.30
Array1(1) = 4.20
Array1(2) = 1.90
Array1(3) = 0.20
Array1(4) = 0.88

Array2(0) = 0.19
Array2(1) = 0.002
Array2(2) = 0.20
Array2(3) = 0.45
Array2(4) = 1.8

Resulted arrays should be as,

Result1(0) = 4.20
Result1(1) = 2.30
Result1(2) = 1.90
Result1(3) = 0.88
Result1(4) = 0.20

Result2(0) = 0.002
Result2(1) = 0.19
Result2(2) = 0.20
Result2(3) = 1.8
Result2(4) = 0.45

Can anybody help me to get these results arrays? I use VB.NET 2010.
Thanks

Posted 25-Apr-12 15:19pm

Member 8312096

Updated 25-Apr-12 15:22pm

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VJ Reddy 26-Apr-12 4:19am

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VJ Reddy · Accepted Answer · 2012-04-25T16:53:00

The Array.Sort(Of TKey, TValue) Method (TKey(), TValue(), IComparer(Of TKey)) explained here http://msdn.microsoft.com/en-us/library/x8kwfbye.aspx[^] can be used for this purpose. In the present case, as the sorting is to be done in Descending order IComparer is required, which is explained here
http://msdn.microsoft.com/en-us/library/8ehhxeaf.aspx#Y700[^]
is required

VB

Private Sub Main()
    Dim Array1(4) As  Double
    Dim Array2(4) As Double

    Array1(0) = 2.3
    Array1(1) = 4.2
    Array1(2) = 1.9
    Array1(3) = 0.2
    Array1(4) = 0.88

    Array2(0) = 0.19
    Array2(1) = 0.002
    Array2(2) = 0.2
    Array2(3) = 0.45
    Array2(4) = 1.8

    Array.Sort(Of Double, Double)(Array1, Array2, New ItemComparer())

End Sub

'ItemComparer for sorting in the Descending order
Public Class ItemComparer
    Implements IComparer(Of Double)

    Public Function Compare(x As Double, y As Double) As Integer _
        Implements IComparer(Of Double).Compare

        Return y.CompareTo(x)
    End Function
End Class