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RE: [xsl] How to filter characters from a string?
Subject: RE: [xsl] How to filter characters from a string? From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> Date: Fri, 29 Mar 2002 21:11:07 -0000 |
Write a translate that removes all the characters that are allowed in base64. The result of this translate is a string containing all the characters that aren't allowed, i.e. the ones you want to remove. Use this as the second parameter for another translate(): translate($x, translate($x, 'ABCDE...abcde...12345...', ''), '') Michael Kay Software AG home: Michael.H.Kay@xxxxxxxxxxxx work: Michael.Kay@xxxxxxxxxxxxxx > -----Original Message----- > From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx > [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Greg Faron > Sent: 28 March 2002 19:10 > To: XSL-List@xxxxxxxxxxxxxxxxxxxxxx > Subject: [xsl] How to filter characters from a string? > > > Hi all, > > I'm practicing XSLT and decided to write my own Base 64 > encoder and > decoder templates. The rules for Base 64 Encoding say that only the > following characters (in an encoded file) should be examined > upon decoding: > <xsl:variable name="base64Map" > select="'ABCDEFGHIJKLMNOPQRSTUVWXYZabcedfghijklmnopqrstuvwxyz0 > 1234567890+/='"/> > > This means that I would like to filter out every character > that is not > one of the 65 above characters. I realize that I could do > this partially > with translate(), but then I would need to specify every > possible illegal > character, of which there are thousands (if you have Unicode > characters in > there). A smaller version of such a command would be > translate($encodedString, > $base64Map, > concat($base64Map, > '=

 > `~!@#$%^&*()-_)"'[]{}|\<>,.?;:')) > > Are there any templates or commands to delete any > character from the > first argument that DOESN'T appear in the second argument? I'm using > Microsoft XSLT engine MSXSL4. > > > Greg Faron > Integre Technical Publishing Co. > > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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