Understanding and Applying Dependency Injection in Elixir

The article, written by Allan MacGregor, explores the controversial topic of using Dependency Injection (DI) in functional programming, specifically Elixir. It explains what dependency injection is and its core components such as Dependency, Injector, Client, and Service. Different types of DI, including Constructor Injection, Setter Injection, and Interface Injection, are also discussed. Allan highlights the benefits of DI, such as reduced coupling, increased flexibility, and improved testability. The post includes practical examples of how DI can be used in Elixir, especially in testing scenarios where mock dependencies can be injected to facilitate isolated testing. It ends with common pitfalls in DI and best practices for effectively implementing DI in Elixir applications.