Understanding ruby .class and .ancestors methods - Stack Overflow
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Modules in Ruby: The one that cannot be instantiated like Class! | CodeX
ruby - Overriding method by another defined in module - Stack Overflow
Ruby Include | How does an Include Statement Work in Ruby?
Ruby Tutorial: Scope | ProTech
The Ruby Object Model - Structure and Semantics
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The Ruby Object Model - ruby-talk - Ruby Mailing List Mirror
Extending Ruby classes
Integrate a Helper Module in Ruby - YouTube
Ruby Object Model / Class / Modules .... diagram anywhere? - Stack Overflow
