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Few days back I wrote for Solid and Grasp principles for oops http://www.developerscloud.org/2014/08/oops-beyond-four-pillars-solid-and-grasp.html . Now I am again extending it to make it more matured way to write code. Let start with coupling and cohesion. Loose/Low Coupling low dependency between classes; low impact in a class of changes in other classes high reuse potential High Cohesion measure of how strongly-related or focused the responsibilities of a single module are If methods of a class tend to be similar in many aspects, then the class have high cohesion In highly-cohesive system, code readability and the likelihood of reuse is increased, while complexity is kept manageable. Also check Encapsulate what varies Favor Composition over Inheritance Program to interface not implementation Strive for loosely coupled design between objects that interact For Interfaces Like an abstract base class: any non-abstract type inhe...

As we know  Object oriented programming is a type of programming paradigm based around programming  classes  and instances of classes called  objects . These can be objects that appear on the screen (e.g., pictures, textboxes, etc.) or are part of the programming (e.g. actors, connections, particles, etc as mentioned in my post  http://www.developerscloud.org/2013/02/what-is-oop-basic-concepts.html   written ages ago. Here we are going to extend the oops beyond its four pillars i.e. Abstraction Encapsulation Polymorphism  and Interfaces i.e.  Inheritance So first we will go through  SOLID and then GRASP SOLID Principles are principles of class design. • S RP: Single Responsibility Principle – An object should have only a single responsibility & all the responsibility should be entirely encapsulated by the class. – There should never be more than one reason for a class to change • O CP: Open/Closed Principle ...

What is OOP? Object oriented programming is a type of programming paradigm based around programming classes and instances of classes called objects. These can be objects that appear on the screen (e.g., pictures, textboxes, etc.) or are part of the programming (e.g. actors, connections, particles, etc.) What is an Object? An object is merely a collection of related information and functionality. An object can be something that has a corresponding real-world manifestation (such as an employee object), something that has some virtual meaning (such as a window on the screen), or just some convenient abstraction within a program (a list of work to be done, for example). An object is composed of the data that describes the object and the operations that can be performed on the object. Information stored in an employee object, for example, might be various identification information (name, address), work information (job title, salary), and so on. The operations performed might include...