Debugging is an annoying necessity in any language, whether it's debugging your own code or somebody else's that you've been given to make work on your system. Anything you can do to make debugging ...

Programming Perl, by Wall, Christiansen and Orwant, O'Reilly. Perl Debugger Pocket Reference, by Richard Foley, O'Reilly. Perl Debugged, by Peter Scott and Ed Wright, Addison-Wesley. Perl Medic, by ...