دانلود کتاب الگوهای طراحی API

API design is complicated. After all, if it were easy there would probably be little need for this book at all. But before we start exploring the tools and pat- terns to make API design a bit more manageable, we first have to agree on some fundamental terminology and what to expect from this book. In the next two chapters, we’ll cover some of the introductory material that will act as a platform for us to build on throughout the rest of the book. We’ll start in chapter 1 by defining in detail what we mean by an API. More importantly, we’ll investigate what good APIs look like and how to distinguish them from bad APIs. Then in chapter 2, we’ll look more closely at what we mean by a design pattern and the anatomy of the patterns outlined in the rest of the book, with the end goal of relying on these design patterns to build consistently good APIs.