 Название: Programming Crystal: Create High-Performance, Safe, Concurrent Apps
Автор: Ivo Balbaert, Simon St. Laurent
Издательство: Pragmatic Bookshelf
ISBN: 1680502867
Год: 2019
Страниц: 266
Язык: английский
Формат: pdf, djvu
Размер: 10.18 MB
Crystal is for Ruby programmers who want more performance, or for developers who enjoy working in a high-level scripting environment. Crystal combines native execution speed and concurrency with Ruby-like syntax, so you will feel right at home. This book, the first available on Crystal, shows you how to write applications that have the beauty and elegance of a modern language, combined with the power of types and modern concurrency tooling. Now you can write beautiful code that runs faster, scales better, and is a breeze to deploy.
Crystal is elegant to read and easy to program like Ruby, allowing full object-oriented development. Its compiler is powerful enough to nearly always infer the type of your variables. So you get the benefits of a statically typed language: more robust code, safety and execution speed, while still reaching high productivity in development. Null pointer exceptions as in javascript, Java or C#, are a thing of the past: Crystal annihilates them, just like Rust.
Explore the building blocks and design of the language, and how you can use the Crystal tool-chain to build and manage powerful applications. Harness the power of the macro system, as well as how to work with fibers and channels, making concurrency as easy as possible. Learn how to use the Kemal web framework and access databases, and how to tap the potential of existing Crystal libraries. Find the spot that Crystal fills in today's software world with real-world examples.
With Crystal, you can combine the best of both worlds: the high-level coding of dynamic languages, and the safety and blazing performance of a natively compiled language.
What You Need:
To develop in Crystal, you only need Crystal v 0.26 the latest version, a common text editor and a browser.
Who This Book Is For:
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.
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Programming Crystal: Create High-Performance, Safe, Concurrent Apps 
