regex.replace and trim

5 Nov 2006 6:47 PM

Pascal

bonjour hello

I would like to trim a string of all its white spaces so i used
myString.trim() but it doesn't work as supposed : unsecable space are
remaining in the middle of my string...
i read in msdn : and notice that trim only Removes all occurrences of white
space characters from the beginning and end of this instance. So what for
the middle ?

      .NET Framework Class Library
      String.Trim Method ()

Remarks
The following table lists the white space characters removed by the Trim
method. The first column lists the Unicode name for the character, and the
second column lists the Unicode hexadecimal notation for the code point that
identifies the character.

      Unicode name
     Unicode code point

      CHARACTER TABULATION
     U+0009

      LINE FEED
     U+000A

      LINE TABULATION
     U+000B

      FORM FEED
     U+000C

      CARRIAGE RETURN
     U+000D

      SPACE
     U+0020

      NO-BREAK SPACE
     U+00A0

      EN QUAD
     U+2000

      EM QUAD
     U+2001

      EN SPACE
     U+2002

      EM SPACE
     U+2003

      THREE-PER-EM SPACE
     U+2004

      FOUR-PER-EM SPACE
     U+2005

      SIX-PER-EM SPACE
     U+2006

      FIGURE SPACE
     U+2007

      PUNCTUATION SPACE
     U+2008

      THIN SPACE
     U+2009

      HAIR SPACE
     U+200A

      ZERO WIDTH SPACE
     U+200B

      IDEOGRAPHIC SPACE
     U+3000

      ZERO WIDTH NO-BREAK SPACE
     U+FEFF

But anything else for the middle than replace ?
perhaps something with regex.replace ?
Public Shared Function Replace ( _
    input As String, _
    pattern As String, _
    replacement As String, _
    options As RegexOptions _
) As String
Dim input As String
Dim pattern() As String 'is it possible to put an array of all white spaces
here ?Dim replacement As String
Dim options As RegexOptions
Dim returnValue As String

returnValue = Regex.Replace(input, pattern, replacement, options)
End FunctionDoes anyone know a good function for removing all theese kind of
space in my string ?
http://www.scalpa.info

5 Nov 2006 7:33 PM

RobinS

Go through the string and check each character.
The fastest way to do this is to use a
StringBuilder and append each valid character to it.

    Public Function RemoveWhiteSpace(ByVal InputString As String) _
      As String
        Dim sb As New StringBuilder(InputString.Length)
        For n As Integer = 0 To InputString.Length - 1
            If Not IsWhiteSpace(InputString, n) Then
                sb.Append(InputString.Substring(n, 1))
            End If
        Next
        Return sb.ToString
    End Function

You need to import System.Char for the IsWhiteSpace method,
and System.Text for the Stringbuilder class.

Robin S.

Show quoteHide quote

"Pascal" <scalpano***@wanadoo.rf> wrote in message
news:454e3184$0$27387$ba4acef3@news.orange.fr...
> bonjour hello
>
> I would like to trim a string of all its white spaces so i used
> myString.trim() but it doesn't work as supposed : unsecable space are
> remaining in the middle of my string...
> i read in msdn : and notice that trim only Removes all occurrences of
> white space characters from the beginning and end of this instance. So
> what for the middle ?
>
>      .NET Framework Class Library
>      String.Trim Method ()
>
>
> Remarks
> The following table lists the white space characters removed by the Trim
> method. The first column lists the Unicode name for the character, and the
> second column lists the Unicode hexadecimal notation for the code point
> that identifies the character.
>
>      Unicode name
>     Unicode code point
>
>      CHARACTER TABULATION
>     U+0009
>
>      LINE FEED
>     U+000A
>
>      LINE TABULATION
>     U+000B
>
>      FORM FEED
>     U+000C
>
>      CARRIAGE RETURN
>     U+000D
>
>      SPACE
>     U+0020
>
>      NO-BREAK SPACE
>     U+00A0
>
>      EN QUAD
>     U+2000
>
>      EM QUAD
>     U+2001
>
>      EN SPACE
>     U+2002
>
>      EM SPACE
>     U+2003
>
>      THREE-PER-EM SPACE
>     U+2004
>
>      FOUR-PER-EM SPACE
>     U+2005
>
>      SIX-PER-EM SPACE
>     U+2006
>
>      FIGURE SPACE
>     U+2007
>
>      PUNCTUATION SPACE
>     U+2008
>
>      THIN SPACE
>     U+2009
>
>      HAIR SPACE
>     U+200A
>
>      ZERO WIDTH SPACE
>     U+200B
>
>      IDEOGRAPHIC SPACE
>     U+3000
>
>      ZERO WIDTH NO-BREAK SPACE
>     U+FEFF
>
>
>
> But anything else for the middle than replace ?
> perhaps something with regex.replace ?
> Public Shared Function Replace ( _
>    input As String, _
>    pattern As String, _
>    replacement As String, _
>    options As RegexOptions _
> ) As String
> Dim input As String
> Dim pattern() As String 'is it possible to put an array of all white
> spaces here ?Dim replacement As String
> Dim options As RegexOptions
> Dim returnValue As String
>
> returnValue = Regex.Replace(input, pattern, replacement, options)
> End FunctionDoes anyone know a good function for removing all theese kind
> of space in my string ?
> http://www.scalpa.info
>

5 Nov 2006 8:09 PM

Pascal

Whoa !!! It works fine.............Thanks a lot

6 Nov 2006 1:47 AM

Smokey Grindel

trim does what it says, "trims" stuff off the start of end not the middle..
if it took from the middle that'd be a substring because it would take from
that point out

Show quoteHide quote

"Pascal" <scalpano***@wanadoo.rf> wrote in message
news:454e3184$0$27387$ba4acef3@news.orange.fr...
> bonjour hello
>
> I would like to trim a string of all its white spaces so i used
> myString.trim() but it doesn't work as supposed : unsecable space are
> remaining in the middle of my string...
> i read in msdn : and notice that trim only Removes all occurrences of
> white space characters from the beginning and end of this instance. So
> what for the middle ?
>
>      .NET Framework Class Library
>      String.Trim Method ()
>
>
> Remarks
> The following table lists the white space characters removed by the Trim
> method. The first column lists the Unicode name for the character, and the
> second column lists the Unicode hexadecimal notation for the code point
> that identifies the character.
>
>      Unicode name
>     Unicode code point
>
>      CHARACTER TABULATION
>     U+0009
>
>      LINE FEED
>     U+000A
>
>      LINE TABULATION
>     U+000B
>
>      FORM FEED
>     U+000C
>
>      CARRIAGE RETURN
>     U+000D
>
>      SPACE
>     U+0020
>
>      NO-BREAK SPACE
>     U+00A0
>
>      EN QUAD
>     U+2000
>
>      EM QUAD
>     U+2001
>
>      EN SPACE
>     U+2002
>
>      EM SPACE
>     U+2003
>
>      THREE-PER-EM SPACE
>     U+2004
>
>      FOUR-PER-EM SPACE
>     U+2005
>
>      SIX-PER-EM SPACE
>     U+2006
>
>      FIGURE SPACE
>     U+2007
>
>      PUNCTUATION SPACE
>     U+2008
>
>      THIN SPACE
>     U+2009
>
>      HAIR SPACE
>     U+200A
>
>      ZERO WIDTH SPACE
>     U+200B
>
>      IDEOGRAPHIC SPACE
>     U+3000
>
>      ZERO WIDTH NO-BREAK SPACE
>     U+FEFF
>
>
>
> But anything else for the middle than replace ?
> perhaps something with regex.replace ?
> Public Shared Function Replace ( _
>    input As String, _
>    pattern As String, _
>    replacement As String, _
>    options As RegexOptions _
> ) As String
> Dim input As String
> Dim pattern() As String 'is it possible to put an array of all white
> spaces here ?Dim replacement As String
> Dim options As RegexOptions
> Dim returnValue As String
>
> returnValue = Regex.Replace(input, pattern, replacement, options)
> End FunctionDoes anyone know a good function for removing all theese kind
> of space in my string ?
> http://www.scalpa.info
>