SOLID Principles in 5 Nightmares

The 5 SOLID principles – popularised by “Uncle” Bob Martin in some of his highly influential books on Object Orientated Software development – are rarely cited directly but they are nevertheless at the heart of a lot of the thinking that goes into modern software development.

These principles have been around in some form or other ever since the 1980s, but continue to be just as relevant today as they were then.

In this talk, we’re going to look at each of the 5 SOLID principles, these being:

* Single Dependency Principle
* Open/Close Principle
* Liskov Substitution Principle
* Interface Segregation Principle
* Dependency Inversion Principle

See what he did there with the names?

We’ll look at each in turn, with the help of some slightly imaginative examples taken from a popular SF franchise. What are they, what nightmare scenarios can occur if they aren’t followed, and how they can subsequently be applied.