Chapter 2. Why We Need Design Patterns?

In this chapter, we will try to understand the necessity of choosing a pattern-based approach to software development. We start with some principles of software development, that one might find useful while undertaking large projects. The working example in this chapter starts with a requirements specification and progresses toward a preliminary implementation. We will then try to iteratively improve the solution using patterns and idioms, and come up with a good design that supports a well-defined programming Interface. During this process, we will learn about some software development principles that one can adhere to, including the following:

  • SOLID principles for OOP
  • Three key uses of design patterns
  • Arlow/Nuestadt ...

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