Facade is a French word meaning “front-gate” or “face”. In Architecture the “Facade” is the exterior wall or the face of a building, which involves with many design elements and patterns to impose the building’s characteristics to the outside. If we consider this in a software design perspective, it give’s…

The mediator design pattern is very useful when building complex application, which interacts with multiple layers and objects in a system. By using this pattern, the tight coupling in such situations can be reduced and higher maintainability with extendibility can be gained. Real World Example Let’s think about a classic…

When we think about chain of responsibility, it gives some understanding or feeling about what it does or what it suppose to do by it self. …