[Perl-unix-users] deleting "invisible" characters

[Tassos123]

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