Learn how to build complete client-side applications with ClojureScript, the Clojure language variant that compiles to optimized JavaScript. This hands-on introduction shows you how ClojureScript not only has similarities to JavaScript--without the flaws--but also supports the full semantics of its parent language. You'll delve into ClojureScript's immutable data structures, lazy sequences, first-class functions, macros, and support for JavaScript libraries.

No previous experience with Clojure or ClojureScript is necessary. If you're familiar with JavaScript, HTML, CSS, and the DOM, you'll quickly discover that ClojureScript has the same reach as JavaScript, but with more power.Start writing ClojureScript code with the Leiningen build systemLearn how the ClojureScript compiler works to produce optimized JavaScriptUse JavaScript functions and libraries directly from ClojureScript codeExplore functions in Clojure's sequence library such as map, reduce, and filterUse macros to define new control structures or embed domain-specific languagesCompile manually or script your own workflow with ClojureScript's compiler toolsIntegrate ClojureScript with Clojure on the JVM to build powerful client-server applications

This book is the first definitive reference for the Clojure language, providing both an introduction to functional programming in general and a more specific introduction to Clojure's features. This book demonstrates the use of the language through examples, including features such assoftware transactional memory (STM)and immutability, which may be new to programmers coming from other languages. Overview of functional programming and description of what sets Clojure apart from other languages Detailed explanation of Clojure's special features Examples of real-world tasks that are well-suited to Clojure's capabilities, starting with simple tasks and moving on to more complex applications What you'll learn What Clojure ismore than just another Lisp How to set up a Clojure environment The structure and syntax of a Clojure program Java interoperability How to use Clojure for real-world tasks Common idioms of Clojure code Who this book is for

There are two audiences for this book: any technical person desiring to know what Clojure is and why they might want to use it, and any programmer desiring to learn and use the language. The goals of these two audiences mesh nicely, given that Clojure has several new, cutting-edge features that programmers are unlikely to have encountered before. Table of Contents The Clojure Way The Clojure Environment Controlling Program Flow Data in Clojure Sequences State Management Namespaces and Libraries Metadata Multimethods and Hierarchies Java Interoperability Parallel Programming Macros and Metaprogramming Datatypes and Protocols Performance