Layered Architecture and Dependency Inversion
Layered architecture separates code into horizontal layers by technical responsibility. A summary of the four-layer structure, dependency direction rules, and how DIP decouples layers.
Dip
Dependency Injection — The Hierarchy of DIP, IoC, and DI
DIP (principle), IoC (pattern), and DI (technique) sit at different levels of abstraction. The hierarchy must be clear before framework features and design principles can be told apart.