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Theory Abstract Factory provides interface for creating set of objects without specifying concrete implementation. Abstract Factory uses abstract classes and decouples concrete implementation from the system.  It brings flexibility to easily wire up different set of objects based on specified abstraction. Abstract Factory helps to ...

One of the beautiful patterns in GOF's (Gang Of Four) patterns bucket is a Decorator Pattern.  The purpose of Decorator pattern is to add extended functionality to the class without making any change in it. This is very useful technic especially when there are many classes derived from one base class which should ...

  Last couple of days I was working on some small project where I had to deal with nested objects (or tree structure objects) and I immediately decided to use Composite design pattern as it is one of the best solution for dealing with tree structure objects. By nested objects or tree structure objects I mean the ...