SOLID Principles

Author: David Giard (@DavidGiard)

SOLID Principles presentation

Code

Lab exercises

Demos

Single responsibility principle

A class should have one and only one reasons to change.

Open closed principle

Objects or entities should be

• open for extension;
• but closed for modification

Liskov substitution principle

If something is true for the base class, it must be true for every derived class

Interface segregation principle

A client should never be forced to implement and interface that it doesn't use

Dependency Inversion principle

Entities must depend on abstractions, not on concrete implementations

Technical Challenge

Challenge