What is the Builder Pattern? The definition of the Builder Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Builder Pattern allows you to encapsulate the construction of a product and allow it to be constructed in steps. Builder Pattern Class Diagram Explained The … [Read more…]
What is the Bridge Pattern? The definition of the Bridge Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Bridge Pattern allows you to vary the implementation and the abstraction by placing the two in separate class hierarchies. Bridge Pattern Pattern Class Diagram Explained … [Read more…]
What is the Proxy Pattern? The definition of the Proxy Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Proxy Pattern provides a surrogate or placeholder for another object to control access to it. Proxy Pattern Class Diagram Explained The above class diagram represents … [Read more…]
What is the State Pattern? The definition of the State Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The State Pattern allows an object to alter its behavior when its internal state changes. The object will appear to change its class. State Pattern Class … [Read more…]
What is the Composite Pattern? The definition of the Composite Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Composite Pattern allows you to compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly. … [Read more…]
What is the Iterator Pattern? The definition of the Iterator Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Iterator Pattern provides a way to access the elements of an aggregate object sequentially without exposing its underlying representation Iterator Pattern Class Diagram Explained So … [Read more…]
What is the Template Method Pattern? The definition of the Template Method Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Template Method Pattern defines a skeleton of an algorithm in a method deferring some steps to subclasses. Template Method lets subclasses redefine certain … [Read more…]
What is the Adapter Pattern? The definition of the Adapter Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Adapter Pattern converts the interface of a class into another interface clients expect. Adapter lets classes work together that couldn’t otherwise because of incompatible interfaces. … [Read more…]
What is the Command Pattern? The definition of the Command Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Command Pattern encapsulates a request as an object, thereby letting you parameterize other objects with different requests, queue or log requests, and support undoable operations. … [Read more…]
What is the Singleton Pattern? The Singleton Pattern makes sure a class has only one instance and provides a way to access it globally. It’s typically preferred, within the development community, to find alternatives to using global access, if possible. What the Singleton Pattern does better than say, a global variable, is that it’s access … [Read more…]