Falling under Creational Patterns, Prototype Pattern aims in creating a clone of your object and is used in scenarios when creating a object is considered costly (may be the creation involves a long Database or Web Service Operation). The formal definition of the pattern is as follows.   Specify the kind of objects to create … Continue reading Design Patterns : Prototype Pattern

While Inheritance/Sub Classing seems to be most natural way of extending functionality, it might not be always the best option. Especially when you want to avoid subclassing as it might result in too many classes. Consider the following scenario. Your nearest Dominos has many varieties of Pizzas. On top of it, you could decorate each … Continue reading Design Patterns : Decorator Pattern

State Pattern is share a lot of similarities with Strategy Pattern, but has its own fundamental differences as well. The State pattern allows to change the behavior of a method, depending on the state of an object, in other words it encapsulates the behavior dependent on the state (the What). This is different from the … Continue reading Design Patterns : State Pattern