Polymorphism in Elixir: Mastering Protocols and Types

In Elixir, writing clean, extensible code requires a deep understanding of how to achieve polymorphism without resorting to complex inheritance hierarchies. This text-based course guides you through Elixir protocols, the core mechanism for dispatching functions dynamically based on data types. You will learn how to design flexible interfaces that make your applications highly modular and easy to maintain. By the end of this course, you will be able to confidently declare protocols and implement them for both built-in system types and custom structs. What you will learn: Understand the foundational concepts of polymorphism and dynamic dispatch in Elixir; Implement protocols for core Elixir data types such as Atom, BitString, List, Map, and Integer; Configure the special Any type to provide robust fallback behavior for your protocols; Utilize modern Elixir practices including struct derivation to reduce boilerplate code; Design clean API boundaries that allow other developers to extend your code safely. The course begins with clear definitions of protocols, consolidation, and type dispatching, before moving on to step-by-step written implementations for individual types and custom structs. This course is designed for beginner to intermediate Elixir developers who understand basic syntax and want to master idiomatic code design. Start reading today to unlock the full power of extensible system design in Elixir.