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Tip of the Day
Language: VB7
Expertise: Intermediate
Mar 24, 2003

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On-Demand

Application Security Testing: An Integral Part of DevOps


CountOccurrences - Counting the number of string occurrences

' Count the number of string occurrences
Public Function CountOccurrences(ByVal source As String, ByVal search As String, _
    Optional ByVal ignoreCase As Boolean = False) As Integer
    Dim options As System.Text.RegularExpressions.RegexOptions
    ' set the search options according to the ignoreCase parameter
    If ignoreCase Then
        options = System.Text.RegularExpressions.RegexOptions.IgnoreCase
    Else
        options = System.Text.RegularExpressions.RegexOptions.None
    End If

    ' count the occurrences
    Dim mc As System.Text.RegularExpressions.MatchCollection = _
        System.Text.RegularExpressions.Regex.Matches(source, search, options)
    Return mc.Count
End Function


' Count the number of string occurrences
Public Function CountOccurrences(ByVal source As String, _
    ByVal startIndex As Integer, ByVal search As String, _
    Optional ByVal ignoreCase As Boolean = False) As Integer
    Return CountOccurrences(source.Substring(startIndex), search, ignoreCase)
End Function
Marco Bellinaso
 
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