Object-Oriented Design

Common Features of Excellent Software: low coupling and High Cohesion

Polymorphism: static polymorphism (function polymorphism, function overload), dynamic polymorphism (virtual function)

Basic object-oriented principles

Principle of opening/closing: a module should be open to expansion and should be closed for modification.

Principle of full replacement: The derived class should be able to completely replace the base class.

Dependency inversion principle: dependent on abstraction, not on concrete.

Non-circular dependency principle: there cannot be circular dependency between packages.

Only implement what you really need and do not implement what you think you need.

Do not repeat yourself: Any code appears only once.

Simplify the design.

Write code for humans, rather than for machines.

Object-Oriented development process:

Object-Oriented Analysis: Demand-Analysis Model

Architecture Analysis

Object-Oriented Design

Encoding

Test

Differences between frameworks and Class Libraries

Software life cycle model: waterfall model, iterative model (RUP, XP)

The most important object-oriented design principles and design concepts hidden behind the design model:

The most fundamental intention of the design pattern is to adapt to the demand changes. (I am talking about: there is no need to change, and the design model seems to have no value)

Programming for interfaces, rather than implementing programming.

Aggregation is preferred, rather than inheritance.