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Tip of the Day
Language: VB7
Expertise: beginner
Aug 18, 2003

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Concatenate an array of strings with commas and a final "and", or other separators

' Concatenate an array of strings with commas and a final "and",
'  or other separators
'
' Example:
'   Debug.WriteLine("Choose one from " & CreateStringList(New String() {"item1",
'  "item2", "item3"}))
'   ' => Choose one from item1, item2 and item3

Function CreateStringList(ByVal items() As String, Optional ByVal sep As String _
    = ", ", Optional ByVal lastSep As String = " and ") As String
    ' join the strings with the first separator
    Dim res As String = String.Join(sep, items)
    ' find the last occurrence of the separator used to join the strings,
    '  remove it and insert the last separator instead
    Dim i As Integer = res.LastIndexOf(sep)
    If i > -1 Then
        res = res.Remove(i, sep.Length)
        res = res.Insert(i, lastSep)
    End If
    Return res
End Function
Marco Bellinaso
 
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