Understanding the Distinctions Between Protocols and Behaviours in Elixir

The article delves into the distinctions between Protocols and Behaviours in Elixir, aiming to clarify the author’s previous misunderstandings. It begins by defining Protocols as mechanisms for achieving polymorphism tied to data types, allowing extension of module functionalities without altering the source. Conversely, Behaviours are presented as formal contracts defining function requirements that modules must adhere to, ensuring conformity. The author highlights crucial differences: Protocols operate on data types and define functionalities, while Behaviours enforce function implementations at a module level. Real-world examples demonstrate how both can coexist within code, enhancing Elixir's extensibility and functionality without confusion.