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Object-oriented vs Functional (OOP (Principle (Inheritance (Benefit…

- - - - A class define a high-level interface to the outside world, leaving the lower-level details to implementation-specific code
    - - A child-class can modify or extend the behavior of its parent-classes
      - Allow child classes inherits the characteristics of existing parent class
      - Benefit
        
        EXtensibility
        
        Reusability
        
        Provides abstraction
        
        Eliminates redundant code
    - - Child-classes can use its own method or parent class. When child and parent classes have two different methods but have the same name, the program will pick the methods depend on which class you are referencing an instance off
    - - A class hide details of how it does its thing, while supplying a nice, clean interface to the outside world
      - Benefit
        
        Hiding implementation details reduces complexity
        
        Ensure structural changes remain local
    - - Cohesion
        
        Describe how closely all the routines in a class or all the code in a routine support a central purpose
        
        Ex
        
        Good
        
        Math has Sin(), Cos()..
        
        Bad
        
        Magic has MakePizza
      - Coupling
        
        Describes how tightly a class or routine is related to other classes or routines
        
        Coupling must kept loose
        
        Modules must depend little on each other
        
        All classes and routines must have small, direct, visible and flexible relations to other classes and routines
        
        One module must be easily used by other modules