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Observer Pattern

Simple project that shows how observer design pattern works.

Design Pattern?

A design pattern is a general reusable solution to a commonly occurring problem within a given context in software design. A design pattern is not a finished design that can be transformed directly into source or machine code. It is a description or template for how to solve a problem that can be used in many different situations. Patterns are formalized best practices that the programmer can use to solve common problems when designing an application or system.Object-oriented design patterns typically show relationships and interactions between classes or objects, without specifying the final application classes or objects that are involved. Patterns that imply object-orientation or more generally mutable state, are not as applicable in functional programming languages.

Design patterns help us optimize our codes.
Software applications with good designs are:
  • easy to maintain
  • easy to debug
  • easy to test
  • etc,.

Why Observer Design Pattern?

It is smart to use when your logic has many implementations. Using this design pattern you are optimizing your code in a way that implementations only subscribes and then observers to your logic, and the logic is coupled loosely to your implementations. In fact it doesn't know about it's implementations the only thing that it knows about it's implementations is that it has its implementations and responsible for updating them.

Last edited May 12, 2014 at 2:54 AM by crisma_victoria, version 4