December 2007
Intermediate to advanced
511 pages
13h 10m
English
Content preview from PHP Objects, Patterns, and Practice, Second Edition
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CHAPTER 8Some Pattern Principles
Although design patterns simply describe solutions to problems, they tend to emphasize solutions that promote reusability and flexibility. To achieve this, they manifest some key object-oriented design principles. We will encounter some of them in this chapter and in more detail throughout the rest of the book.
This chapter will cover
- Composition: How to use object aggregation to achieve greater flexibility than you could with inheritance alone
- Decoupling: How to reduce dependency between elements in a system
- The power of the interface: Patterns and polymorphism
- Pattern categories: The types of pattern that this book will cover
The Pattern Revelation
I first started working with objects in the Java language. ...
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