From Ruby to Elixir: Unleash the Full Potential of Functional Programming

Acknowledgments....10 Introduction....12 Who Should Read This Book?....13 About This Book....14 About the Code....15 Online Resources....16 Part I. Fundamentals of Elixir....17 1. Why Elixir? Why Now?....18 The Joy of Ruby....19 The Case for Elixir....21 Erlang, OTP, Elixir, and Friends....25 Install Elixir on Your Computer....29 Write Your First Elixir Code....31 Wrapping Up....33 2. New Language, New Syntax....35 The Big Picture....36 Data Types....38 Operators....41 Module and Function Basics....44 Fun with Functions....49 Capturing Functions....54 Advanced Module Keywords....57 Compile Time vs. Runtime....61 Wrapping Up....63 3. Working with Data....65 Lists—Not Arrays....66 Maps—Your Data Layer Foundation....71 Implementing Data Structures....77 Enumerating Data Structures....80 Wrapping Up....86 4. Pattern Matching Your Way to Success....88 Pattern Matching Basics....90 Use Patterns for Control Flow....97 Level Up Your Functions....104 Wrapping Up....110 5. GenServers: Build Cities, Not Skyscrapers....111 Parallelism vs. Concurrency....113 Explore Elixir Processes....118 Go Parallel with GenServers....126 Be Parallel, Be Cautious....132 Build Cities, Not Skyscrapers....134 Wrapping Up....136 Part II. Tools of the Trade....138 6. Persisting Data with Ecto....139 What Will We Build?....141 The Foundations of Ecto....145 Write an Ecto Schema....148 Use Migrations to Create Database Tables....155 Use Changesets to Persist Data....160 Query Data with Ecto.Query....165 Put Everything in a Context....175 Wrapping Up....178 7. Serving Requests with Phoenix....181 Explore the Foundations of Phoenix....182 Route Requests Through Phoenix....188 Serve Requests with Phoenix Controllers....193 Manage Static Assets....203 Use Components to Keep Your User Interface Clean....206 Phoenix Is More Than Controllers....212 Wrapping Up....214 8. Outbound HTTP Requests with Req....217 Decide on Which HTTP Client to Use....219 Prep Your Project for Req....224 Use Req to Make Requests....227 See Your App in Action....231 Wrapping Up....234 9. Asynchronous Jobs with Oban....236 Understand Async Job Systems....238 Explore Asynchronous Jobs in Elixir....243 Implement an Oban Worker....248 More About Oban....256 Wrapping Up....259 10. Testing Elixir....261 Create Your First Test....263 Test an Ecto Query....268 Test External API Requests....271 Test Phoenix Requests....275 Test Oban Jobs....281 Wrapping Up....285 11. The Future of Elixir....287 Deployment and Observability....288 Real-Time Apps with LiveView....290 GraphQL with Absinthe....291 Machine Learning with Nx and Bumblebee....292 Type Systems....294 Wrapping Up....296 The End of Our Journey....298 Bibliography....300