Tassos,
 
I'm not sure how to view or convert the "invisible" characters.  You might try something like this to remove them.  This will find anything that is not an alpha, _, numeric, or legitimate white space and replace it with nothing in $string.  The caveat here is that it will also remove anything like #, @, ^, *, etc. that might be in the string.  You could add those to the regular expression of course but I didn't want to go to the effort of adding every special character on the keyboard.
 
$string =~ /[^\w\s\d]//g

Matt Schneider
Programmer/System Administrator
SKLD Information Services, LLC

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 11, 2003 8:48 AM
To: [EMAIL PROTECTED]
Subject: [Perl-unix-users] deleting "invisible" characters

Hi all,

I have a file that contains some "invisible" characters. These characters
look like white spaces when I open the file in a text editor. Is there
a way I can make them visible so that I can manipulate them with a Perl
script? Is there a Perl function that allows me to delete any "invisible"
character? Can I convert them to hex/octal values?

Thanks,
--tassos

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