StripNonNumeric Function using Regular Expressions
by Ian WeatherburnI attach a revised version (written in VB, but easily converted to VBScript) that uses regular-expression matching to perform a far more efficient replacement. On a 440,754 byte file your routine took about 14 seconds while on the same file the regular expression matching took less than 1 second!!!!
Kind Regards
Ian Weatherburn
Here is the attached regular expression algorithm.
'*----------------------------------------------------------------------
'* Method: StripNonNumeric
'* Parameters: sInput - The string to remove numeric values from
'* sReplaceStr - (Optional) Replace values with this string
'* Defaults to empty string ("")
'* Returns: String - The replace string
'* Description: Utilising regular expression matching, remove numeric
'* values from the passed string and return the cleaned
'* up string
'*----------------------------------------------------------------------
Private Function StripNonNumeric(ByVal sInput As String, _
Optional ByVal sReplaceStr As String = "")
As String
Dim objRegExp As Object
Dim sNew As String
' Create an instance of the VBScript Regular Expression matching object
Set objRegExp = CreateObject("VBScript.RegExp")
With objRegExp
' A Boolean value that indicates if a pattern should match all
occurrences
' in an entire search string or just the first one.
.Global = True
' Sets or returns a Boolean value that indicates if a pattern search is
' case-sensitive or not. Redundant in this case - for example only
.IgnoreCase = True
' Sets or returns the regular expression pattern being searched for
.Pattern = "[0123456789]"
' Replaces text found in a regular expression search.
sNew = .Replace(sInput, sReplaceStr)
End With ' objRegExp
' Release the regular expression matching object
Set objRegExp = Nothing
' Return the stripped string
StripNonNumeric = sNew
End Function ' StripNonNumeric
'*---------------------------------------------------------------------- |
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