Module

Modules are components that make up a more complex system through their properties and interactions with other modules

Modules consist of an interface and an implementation

The interface of a module is its complexity cost while it’s depth is functionality

• Thus we prefer deep modules with small interfaces
• Shallow modules are a code smell
• Ex: Unix IO interface and Garbage collectors

When designing modules, focus on the information needed to perform the task.

• The order of execution shouldn’t be a concern

If the interface resembles the abstractions/internal representation used in the implementation, that’s a code smell