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Pretty printing complex data structures in Ruby - like Data::Dumper in Perl

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Creating complex data structures (hashes of hashes of arrays of hashes of arrays....) is easy in Ruby.

Unedrstanding what we have on our hand can be a bit more difficult.

Perl has a build in modules called Data::Dumper that can be used to pirnt complex data structures, for example when debugging Perl programs.

Ruby has pp, the Pretty Printer for the same purpose.

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