ruby - Overriding method by another defined in module - Stack Overflow
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Ruby Classes and Superclasses | a little place of calm
How to Use The Ruby Alias Keyword - RubyGuides
Class Inheritance VS Modules in Ruby - DEV Community
The Ruby Object Model - Structure and Semantics
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Types, Classes, and Modules in Ruby - Coding Ninjas
Ruby Sub-Classes/Inheritance, Include, And Extend | Kappa Computer Solutions, LLC
The Ruby Module Builder Pattern - dejimata
Classes vs Modules
Ruby OOP - What Is Object Oriented Programming?
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Classes in Ruby | Ruby Tutorial | Studytonight
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Ruby composition. Why use Class, not Module? - Stack Overflow
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A diagram of the Ruby Core object model - Jerome's Adventures in Software
Classes vs Modules
