In real life software development one particular challenge we developers constantly face is requirement changes. Anyone who is in the software business game knows how frequently and drastically software specification can change in any time. For this reason, in software engineering only one thing is considered as constant: CHANGE!
In object oriented world, we have some nice ways to deal with this, i.e. design patterns to the rescue. There are lots and lots of design patterns out there to help us, the developers. Amongst them the most common and widely used one is known as Strategy Pattern. Any developer with a few years of experience under his/her belt uses this quite frequently (sometimes even without knowing they are using it!).
In this post I am going to try to create a scenario, which we can solve using strategy pattern.