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

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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