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Tip of the Day
Language: VB
Expertise: Intermediate
Nov 22, 2006

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Replace All Occurences of Numbers in the Input String

This function replaces all occurences of numbers in the input string with '#' and returns the replaced string. It recognizes integers, floating point, and negative numbers. It will not replace digits that are actually part of a word (eg: 'var5' or 'level9code'). Special care is taken for numbers in formats like '=45'.

The function keeps scanning the string for " " (a space) and then extracts the word before it. If the word is numeric, it replaces that word with '#'. Special care is taken for last word which doesn't have a space at its end.


'Replaces all occurences of numbers from a string with "#"
Function ReplaceNumbers(sample As String) As String
Dim fromx As Integer
Dim pos As Long
Dim tmp As String

fromx = 1
Do While fromx < Len(sample)

'To recognise numbers of the form "=45"
If Mid(sample, fromx, 1) = "=" Then fromx = fromx + 1

pos = InStr(fromx, sample, " ", vbTextCompare)
If pos <> 0 Then
  tmp = Mid(sample, fromx, pos - fromx)
  If IsNumeric(tmp) Then
     sample = Replace(sample, tmp, "#", 1, 1, vbTextCompare)
  End If
Else
  Exit Do
End If
fromx = pos + 1
Loop

'For last word
If Mid(sample, fromx, 1) = "=" Then fromx = fromx + 1
tmp = Mid(sample, fromx, Len(sample))
If IsNumeric(tmp) Then
     sample = Replace(sample, tmp, "#", 1, 1, vbTextCompare)
End If
  
ReplaceNumbers = sample
End Function
Sameer Palande
 
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