Balbaert Ivo, St. Laurent Simon / Балберт Иво, Сен-Лоран Семён - Programming Crystal: Create High-Performance, Safe, Concurrent Apps / Программирование на языке Кристалл [2019, PDF, ENG]

Оглавление

Preface
Getting Started
    Diving into Crystal
        A Programming Language for Humans and Computers
        Slick As Ruby, But Way Faster
        Almost As Fast As C
        Speeding Up the Web
        Talking to Databases
        More Safety Through Types
        No to the Billion-Dollar Mistake
        Batteries Included
        Putting Crystal to Good Use
        A Company’s Story Crystallized: Red Panthers
        Wrapping Up
    Crystal Foundations excerpt
        Using Basic Variables and Types
        Variable Operations
        Structuring Data with Container Types
        Controlling the Flow
        Using Methods
        Organizing Code in Classes and Modules
        Executing Code Concurrently Through Fibers
        A Company’s Story Crystallized: Dev Demand
        Wrapping Up
Building Blocks
    Typing Variables and Controlling the Flow
        Converting Data Between Types
        Getting Input
        Putting It Together—Converting Currencies 1
        Exception Handling for Faulty Input
        Chaining Methods
        Getting Input from Command-Line Arguments
        Using String Methods
        Using Symbols as Identifiers
        Using Enums
        Using Regular Expressions
        Putting It Together—Converting Currencies 2
        Beyond Hashes and Arrays: More Composite Types
        Nilable Types
        Controlling the Flow and Types
        A Company’s Story Crystallized: Linkfeed
        Wrapping Up
    Organizing Code in Methods and Procs
        Passing Arguments
        Returning Values
        Working with Yield, Procs, and Blocks
        Overloading and Multiple Dispatch
        Using a Shorter Syntax for Exception Handling
        Using Recursive Methods
        A Company’s Story Crystallized: Duo Design
        Wrapping Up
    Using Classes and Structs excerpt
        Converting a Ruby Class to Crystal
        Structuring a Class
        Applying Inheritance
        Controlling Visibility
        Working with Structs
        Viewing the Type Hierarchy
        Some Nice Tricks
        A Company’s Story Crystallized: LI-COR Biosciences
        Wrapping Up
    Working with Modules
        Combining Files with Require
        Using Modules as Namespaces
        Letting Modules Extend Themselves
        Mixing in Modules
        How the Compiler Finds Methods
        Applying Built-In Modules
        A Company’s Story Crystallized: Diploid
        Wrapping Up
    Managing Projects
        Creating a Shard
        Formatting Code
        Documenting a Project
        Writing Tests with Spec
        Using External Libraries
        Benchmarking Your Code
        Deploying a Crystal App
        A Company’s Story Crystallized: Diploid—Part 2
        Wrapping Up
Advanced Crystal
    Advanced Features
        DRY Your Code with Macros
        Low-Level Programming and C Bindings
        Creating Concurrent Code
        Accessing Databases
        A Company’s Story Crystallized: NeuraLegion
        Wrapping Up
    Using Web Frameworks and Shards
        Build Web Applications with the Kemal and Amber Frameworks
        A Brief Tour of the Shard Ecosystem
        A Company’s Story Crystallized: Kemal in Production
        Wrapping Up and Afterword
Appendices
    Setting Up a Crystal Environment
        Working with Crystal Online
        Installing Crystal on Your Machine
        Compiling Code
        Using Editors and IDEs
        Working with Crystal Playground
        Using Crystal Documentation
        Wrapping Up
    Porting Ruby Code to Crystal
        Ruby Extensions in Crystal
    Your Turn Answers
        Chapter 2: Crystal Foundations
        Chapter 3: Typing Variables and Controlling the Flow
        Chapter 4: Organizing Code in Methods and Procs
        Chapter 5: Using Classes and Structs
        Chapter 6: Working with Modules
        Chapter 7: Managing Projects
        Chapter 8: Advanced Features
        Chapter 9: Web Frameworks and the Shard Ecosystem
        Appendix 1: Setting Up a Crystal Environment