Hands-On Design Patterns with Swift

Separation of concerns

The Separation of concerns is a principle for separating a computer program into distinct modules, where each module addresses a separate concern. A concern can be defined as a set of information or behavior that is part of a computer programming. An example could be persisting data in a store or calculating the discount to apply in an e-commerce app. A program that has an effective and clear separation of concerns is called modular. Dependency Injection helps to reach the modularity of a software defining only the interface of the module so that the details of the implementation don't interfere with the business logic of the module. However, a loosely-coupled code isn't automatically obtained with DI, it needs to be ...