References

The thing the reference point to is the "referent".

To access array and hashrefs, use the -> operator.

• A reference belongs to one class
• An object reference can inherit from other classes
• You can ask an object if it inherited from a class with isa
• Don't use without a good reason

Arrays of arrayrefs, hashes of hashrefs

Submit a PR to github.com/petdance/perl101