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How do I print out or copy a recursive data structure?

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How do I print out or copy a recursive data structure?

The Data::Dumper module on CPAN is nice for printing out data structures, and FreezeThaw for copying them. For example:

    use FreezeThaw qw(freeze thaw);
    $new = thaw freeze $old;

Where $old can be (a reference to) any kind of data structure you'd like. It will be deeply copied.

Source: Perl FAQ: Data Manipulation
Copyright: Copyright (c) 1997 Tom Christiansen and Nathan Torkington.
Next: How do I define methods for every class/object?

Previous: How do I keep persistent data across program calls?

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