🔗 A struct is just a map with rules

Elixir's structs are more than just advanced maps; they enforce rules that prevent typographical errors. When modeling data, like a user profile, using a map can lead to subtle bugs if a key is misspelled — Elixir won't catch it. Bruce Tate points out that structs enable you to define specific keys within a module, allowing the compiler to enforce structure and prevent mistakes. Each struct contains an extra __struct__ key that links it to the module's definitions, ensuring the correct framework is maintained. By contrasting maps and structs, Tate emphasizes that maps are useful for dynamic and flexible data, while structs are designed for fixed data types. This nuanced distinction helps developers make informed choices when structuring Elixir applications, aligning with best practices seen within Elixir's own modules. Using structs can significantly improve code reliability and clarity.