DIP - The Dependency Inversion Principle

• Posted by dan on May 6, 2013
• 2 comments

Here it is the final SOLID principle the Dependency Inversion Principle. In this brief video we'll talk about Robert Martin's premise that:

A. High-level modules should not depend on low-level modules. Both should depend on abstractions.
B. Abstractions should not depend upon details. Details should depend upon abstractions.

Shoutout

The opening drawing of 'inverted dependents' was originally by Tim Musgrove, it made me laugh, full credit to him for that :)

SOLID Principles

The SOLID principles are namely.

• SRP - Single Responsibility Principle
• OCP - Open Closed Principle
• LSP - Liskov Substitution Principle
• ISP - Interface Segreation Principle
• DIP - Dependency Inversion Principle

 

ISP - The Interface Segregation Principle

• Posted by dan on April 23, 2013
• 1 comments

For the penultimate episode of my mini-series on the SOLID Principles we look at the Interface Segregation Principle or ISP which states:

No client should be forced to depend on methods it does not use.