nombre commun

Function Classer(n As String) As String
Dim i%, a
If Len(n) < 2 Or Not n Like String(Len(n), "#") Then Exit Function
ReDim a(1 To Len(n))
For i = 1 To UBound(a): a(i) = Mid(n, i, 1): Next
tri a, 1, UBound(a)
Classer = Replace(Join(a, ""), 0, "#") 'NB.SI ignore les zéros non significatifs
End Function

Sub tri(a, gauc, droi)  ' Quick sort
Dim ref, g, d, temp
ref = a((gauc + droi) \ 2)
g = gauc: d = droi
Do
    Do While a(g) < ref: g = g + 1: Loop
    Do While ref < a(d): d = d - 1: Loop
    If g <= d Then
      temp = a(g): a(g) = a(d): a(d) = temp
      g = g + 1: d = d - 1
    End If
Loop While g <= d
If g < droi Then Call tri(a, g, droi)
If gauc < d Then Call tri(a, gauc, d)
End Sub

Private Sub Worksheet_Change(ByVal Target As Range)
Dim tablo, doublon(), d As Object, i&, x$
If FilterMode Then ShowAllData 'si la feuille est filtrée
tablo = [T].Resize([T].Rows.Count + 1) 'tableau, plus rapide, au moins 2 éléments
ReDim doublon(1 To UBound(tablo) - 1, 1 To 1)
Set d = CreateObject("Scripting.Dictionary")
For i = 1 To UBound(doublon)
    x = Classer(CStr(tablo(i, 1))) 'appelle la fonction
    If x <> "" Then
        If d.exists(x) Then
            doublon(d(x), 1) = tablo(d(x), 1)
            doublon(i, 1) = tablo(i, 1)
        Else
            d(x) = i 'mémorise la ligne
        End If
    End If
Next
Application.EnableEvents = False
[M] = doublon
Application.EnableEvents = True
End Sub