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One can execute perl commands inside the debugger. For example, typing print $x at the debugger prompt will print the value of the $x variable. You can also modify the values of variables in this way, or run functions, etc.
One special command that is also useful is x. x $var displays $var in a hierarchical manner, which is very useful for lists of lists etc. The Data::Dumper module which is available from CPAN offers a similar functionality, from within your perl programs.
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Written by Shlomi Fish