December 2015
Beginner to intermediate
195 pages
2h 52m
English
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CHAPTER 5
Decorator Patterns
GoF Definition: Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.
Concept
This main principle of this pattern says that we cannot modify existing functionalities but we can extend them. In other words, this pattern is open for extension but closed for modification. The core concept applies when we want to add some specific functionalities to some specific object instead of to the whole class.
Real-Life Example
Suppose you already own a house. Now you have decided to add an additional floor. Obviously, you do not want to ...
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