OOP – Back to Basic!

Gøran HansenSeniorkonsulent, Capgeminihttp://blog.goeran.nomail@goeran.noTwitter.com/goeran

”Vi kan unngå spagettikode ved å bry oss om kvaliteten på koden vi skriver!”

What does these have in common?

.NET

VB.NET

C# Ruby

Python

Silverlight

Flash

Java

ASP.NET MVC

Ruby on Rails

WPF

Azure

Object Orientation!

Encapsulation, Inheritance, Polymorphism

Loose Coupling

Cohesion

Design Principles

Single Responsibility Principle – SRP

”There should never be more than one reason for the class to change” – Tom DeMarco

http://www.objectmentor.com/resources/articles/srp.pdf

Dependency Inversion Principle – DIP

”High level modules should not depend upon low level modules. Both should depend upon

asbtractions”

”Abstractions should not depend upon details. Details should depend upon abstractions”

- Robert C. Martin (Unclebobmartin)

http://www.objectmentor.com/resources/articles/dip.pdf

Open-Closed Principle – OCP

”Should be open for extensions but closed for modification” – Bertand Meyer (1988)

http://www.objectmentor.com/resources/articles/ocp.pdf

SRPDIPOCP

S.O.L.I.D

”Vi kan unngå spagettikode ved å bry oss om kvaliteten på koden vi skriver!”

Recommended reading

• http://www.objectmentor.com/resources/publishedArticles.html

• http://msdn.microsoft.com/en-us/magazine/cc546578.aspx

• http://blog.objectmentor.com/• http://codebetter.com/blogs/jeremy.miller/

OOP – Back to Basic!

Gøran HansenSeniorkonsulent, Capgeminihttp://blog.goeran.nomail@goeran.noTwitter.com/goeran