challenge#1 in Perl-module arch

Pretend to be Larry Wall before he designed the module AR. Larry was pondering how to seamlessly integrate a module and its “client”.

Looks like Larry’s very first challenge was namespace sharing between the module and its client. A module, being a library, defines utility subrutines, to be called within client’s namespace.

This first challenge introduces us to Exporter.pm, “polluting”, packages, sybol tables ..

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