Programming Clojure

The second edition of Programming Clojure is the first book to cover the new features in Clojure 1.3. Clojure experts Stuart Halloway and Aaron Bedra have updated the first book on Clojure, and new examples have been added to demonstrate the power and depth of the new features. Programming Clojure, 2nd Edition covers new concepts like Protocols and Datatypes, as well as Clojure...

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The second edition of Programming Clojure is the first book to cover the new features in Clojure 1.3. Clojure experts Stuart Halloway and Aaron Bedra have updated the first book on Clojure, and new examples have been added to demonstrate the power and depth of the new features. Programming Clojure, 2nd Edition covers new concepts like Protocols and Datatypes, as well as Clojure's changes to the numerics system. In addition, this book includes coverage of ClojureScript, a new platform for the Clojure language that rests on top of JavaScript. This book provides the foundation you need to understand the power of the Clojure language and how to wield it. Clojure is an increasingly important language. It recently overtook Scala in relative growth, and is becoming the language of choice for many who are moving to functional programming or dealing with the challenges of concurrency. More and more developers are starting to see what Clojure has to offer. * Simplicity. Clojure's clean, careful design lets you write programs that get right to the essence of a problem, without a lot of clutter and ceremony. * Clojure has the power inherent in Lisp, but is not constrained by its history. * Clojure is a functional language. Data structures are immutable, and functions tend to be side-effect free. This makes it easier to write correct programs, and to compose large programs from smaller ones. * Clojure is concurrent. Rather than error-prone locking, Clojure provides software transactional memory. * Clojure embraces Java. Calling from Clojure to Java is direct, and goes through no translation layer. * Clojure is fast. Wherever you need it, you can get the exact same performance that you could get from hand-written Java code. Many other languages offer some of these features, but the combination of them all makes Clojure sparkle. Programming Clojure, 2nd Edition shows you why these features are so important, and how you can use Clojure to build powerful programs quickly. Reviewers called the first edition of Programming Clojure "a masterwork," "well-organized and easy-to-read," "a great reference," "a mature and polished guide," and "a real pleasure to read." This second edition not only provides up-to-date coverage of the language, but is a fantastic reference that you can keep close to you during the development of your own Clojure programs. What You Need: * Oracle JDK 6 * A text editor

Foreword for the Second Edition
Foreword for the First Edition
Acknowledgments
Preface
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1. Getting Started
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Foreword for the Second Edition
Foreword for the First Edition
Acknowledgments
Preface
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1. Getting Started
1.1 Why Clojure?
1.2 Clojure Coding Quick Start
1.3 Exploring Clojure Libraries
1.4 Wrapping Up
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2. Exploring Clojure
2.1 Forms
2.2 Reader Macros
2.3 Functions
2.4 Vars, Bindings, and Namespaces
2.5 Calling Java
2.6 Flow Control
2.7 Where’s My for Loop?
2.8 Metadata
2.9 Wrapping Up
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3. Unifying Data with Sequences
3.1 Everything Is a Sequence
3.2 Using the Sequence Library
3.3 Lazy and Infinite Sequences
3.4 Clojure Makes Java Seq-able
3.5 Calling Structure-Specific Functions
3.6 Wrapping Up
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4. Functional Programming
4.1 Functional Programming Concepts
4.2 How to Be Lazy
4.3 Lazier Than Lazy
4.4 Recursion Revisited
4.5 Wrapping Up
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5. State
5.1 Concurrency, Parallelism, and Locking
5.2 Refs and Software Transactional Memory
5.3 Use Atoms for Uncoordinated, Synchronous Updates
5.4 Use Agents for Asynchronous Updates
5.5 Managing Per-Thread State with Vars
5.6 A Clojure Snake
5.7 Wrapping Up
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6. Protocols and Datatypes
6.1 Programming to Abstractions
6.2 Interfaces
6.3 Protocols
6.4 Datatypes
6.5 Records
6.6 reify
6.7 Wrapping Up
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7. Macros
7.1 When to Use Macros
7.2 Writing a Control Flow Macro
7.3 Making Macros Simpler
7.4 Taxonomy of Macros
7.5 Wrapping Up
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8. Multimethods
8.1 Living Without Multimethods
8.2 Defining Multimethods
8.3 Moving Beyond Simple Dispatch
8.4 Creating Ad Hoc Taxonomies
8.5 When Should I Use Multimethods?
8.6 Wrapping Up
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9. Java Down and Dirty
9.1 Exception Handling
9.2 Wrestling with the Integers
9.3 Optimizing for Performance
9.4 Creating Java Classes in Clojure
9.5 A Real-World Example
9.6 Wrapping Up
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10. Building an Application
10.1 Scoring a Clojurebreaker Game
10.2 Testing the Scorer
10.3 test.generative
10.4 Creating an Interface
10.5 Deploying Your Code
10.6 Farewell
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A1. Editor Support
A2. Bibliography
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Index
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