دانلود کتاب Programming Crystal: Create High-Performance, Safe, Concurrent Apps

This book is for you if you’re a developer who’d like to learn more about what Crystal has to offer and why it will be a useful tool in your software toolbelt. If you already know Ruby, switching to Crystal will be almost effortless—you should feel at home quickly. You can reuse a lot of knowledge, established principles, and practices from the Ruby world in your Crystal projects. You just need to pay some attention to the types of certain variables, and the compiler will help you out with that. You don’t, however, need Ruby experience to get the most from this book. Crystal is also approachable to newcomers from other programming languages, or for newcomers to programming. This book assumes you’re familiar with basic programming terms and concepts. You’ll have a head start if you come from another object-oriented language or a statically compiled language.
What’s In This Book

This book teaches the basics of Crystal with an emphasis on how its developers structured it's design to make it perform so well. As Crystal is a recent addition to the programming world, convincing companies and people to use it is trickier than promoting familiar tools.

To help deal with those challenges, you’ll find discussions about real-world use cases, entitled “A Company’s Story Crystallized,” at the end of each chapter.
programming crystal, concurrent apps
This book is organized into three parts:

Part I - Getting Started We’ll begin by going over all the good reasons why you should use Crystal. Then you’ll set up a working Crystal environment and work through a minitutorial.

Part II - Building Blocks This part examines the building blocks of Crystal in much greater depth: variable types, basic and compound data types, control structures, methods, classes, modules, generating docs, testing framework and code formatting.

Part III - Advanced Features Once you’ve learned the heart of the language, you can explore Crystal’s features for maximizing code reuse, as well as sharing code and data.