Table of Contents

Preface; Who Is This Book For?; How to Read This Book; Who’s “We”?; Acknowledgments; Conventions Used in This Book; Using Code Examples; Safari® Books Online; How to Contact Us; Chapter 1: Down the Rabbit Hole; 1.1 Why Clojure?; 1.2 Obtaining Clojure; 1.3 The Clojure REPL; 1.4 No, Parentheses Actually Won’t Make You Go Blind; 1.5 Expressions, Operators, Syntax, and Precedence; 1.6 Homoiconicity; 1.7 The Reader; 1.8 Namespaces; 1.9 Symbol Evaluation; 1.10 Special Forms; 1.11 Putting It All Together; 1.12 This Is Just the Beginning; Functional Programming and Concurrency; Chapter 2: Functional Programming; 2.1 What Does Functional Programming Mean?; 2.2 On the Importance of Values; 2.3 First-Class and Higher-Order Functions; 2.4 Composition of Function(ality); 2.5 Pure Functions; 2.6 Functional Programming in the Real World; Chapter 3: Collections and Data Structures; 3.1 Abstractions over Implementations; 3.2 Concise Collection Access; 3.3 Data Structure Types; 3.4 Immutability and Persistence; 3.5 Metadata; 3.6 Putting Clojure’s Collections to Work; 3.7 In Summary; Chapter 4: Concurrency and Parallelism; 4.1 Shifting Computation Through Time and Space; 4.2 Parallelism on the Cheap; 4.3 State and Identity; 4.4 Clojure Reference Types; 4.5 Classifying Concurrent Operations; 4.6 Atoms; 4.7 Notifications and Constraints; 4.8 Refs; 4.9 Vars; 4.10 Agents; 4.11 Using Java’s Concurrency Primitives; 4.12 Final Thoughts; Building Abstractions; Chapter 5: Macros; 5.1 What Is a Macro?; 5.2 Writing Your First Macro; 5.3 Debugging Macros; 5.4 Syntax; 5.5 When to Use Macros; 5.6 Hygiene; 5.7 Common Macro Idioms and Patterns; 5.8 The Implicit Arguments: &env and &form; 5.9 In Detail(:|:) -> and ->>; 5.10 Final Thoughts; Chapter 6: Datatypes and Protocols; 6.1 Protocols; 6.2 Extending to Existing Types; 6.3 Defining Your Own Types; 6.4 Implementing Protocols; 6.5 Protocol Introspection; 6.6 Protocol Dispatch Edge Cases; 6.7 Participating in Clojure’s Collection Abstractions; 6.8 Final Thoughts; Chapter 7: Multimethods; 7.1 Multimethods Basics; 7.2 Toward Hierarchies; 7.3 Hierarchies; 7.4 Making It Really Multiple!; 7.5 A Few More Things; 7.6 Final Thoughts; Tools, Platform, and Projects; Chapter 8: Organizing and Building Clojure Projects; 8.1 Project Geography; 8.2 Build; 8.3 Final Thoughts; Chapter 9: Java and JVM Interoperability; 9.1 The JVM Is Clojure’s Foundation; 9.2 Using Java Classes, Methods, and Fields; 9.3 Handy Interop Utilities; 9.4 Exceptions and Error Handling; 9.5 Type Hinting for Performance; 9.6 Arrays; 9.7 Defining Classes and Implementing Interfaces; 9.8 Using Clojure from Java; 9.9 Collaborating Partners; Chapter 10: REPL-Oriented Programming; 10.1 Interactive Development; 10.2 Tooling; 10.3 Debugging, Monitoring, and Patching Production in the REPL; 10.4 Limitations to Redefining Constructs; 10.5 In Summary; Practicums; Chapter 11: Numerics and Mathematics; 11.1 Clojure Numerics; 11.2 Clojure Mathematics; 11.3 Equality and Equivalence; 11.4 Optimizing Numeric Performance; 11.5 Visualizing the Mandelbrot Set in Clojure; Chapter 12: Design Patterns; 12.1 Dependency Injection; 12.2 Strategy Pattern; 12.3 Chain of Responsibility; 12.4 Aspect-Oriented Programming; 12.5 Final Thoughts; Chapter 13: Testing; 13.1 Immutable Values and Pure Functions; 13.2 clojure.test; 13.3 Growing an HTML DSL; 13.4 Relying upon Assertions; Chapter 14: Using Relational Databases; 14.1 clojure.java.jdbc; 14.2 Korma; 14.3 Hibernate; 14.4 Final Thoughts; Chapter 15: Using Nonrelational Databases; 15.1 Getting Set Up with CouchDB and Clutch; 15.2 Basic CRUD Operations; 15.3 Views; 15.4 _changes: Abusing CouchDB as a Message Queue; 15.5 À la Carte Message Queues; 15.6 Final Thoughts; Chapter 16: Clojure and the Web; 16.1 The “Clojure Stack”; 16.2 The Foundation: Ring; 16.3 Routing Requests with Compojure; 16.4 Templating; 16.5 Final Thoughts; Chapter 17: Deploying Clojure Web Applications; 17.1 Java and Clojure Web Architecture; 17.2 Running Web Apps Locally; 17.3 Web Application Deployment; 17.4 Going Beyond Simple Web Application Deployment; Miscellanea; Chapter 18: Choosing Clojure Type Definition Forms Wisely; Chapter 19: Introducing Clojure into Your Workplace; 19.1 Just the Facts…; 19.2 Emphasize Productivity; 19.3 Emphasize Community; 19.4 Be Prudent; Chapter 20: What’s Next?; 20.1 (dissoc Clojure 'JVM); 20.2 4Clojure; 20.3 Overtone; 20.4 core.logic; 20.5 Pallet; 20.6 Avout; 20.7 Clojure on Heroku; Colophon;