Clojure for Java Developers电子书

Clojure for Java Developers

Table of Contents

Clojure for Java Developers

Credits

About the Author

About the Reviewer

www.PacktPub.com

eBooks, discount offers, and more

Why subscribe?

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Piracy

Questions

1. Getting Started with Clojure

Getting to know Clojure

Installing Leiningen

Using a REPL

The nREPL protocol

Hello world

REPL utilities and conventions

Creating a new project

Project structure

Creating a standalone app

Using Cursive Clojure

Installing Cursive Clojure

Getting started with Clojure code and data

Lists in Clojure

Operations in Clojure

Functions in Clojure

Clojure's data types

Scalars

Collection data types

Summary

2. Namespaces, Packages, and Tests

Namespaces in Clojure

Packages in Clojure

The classpath and the classloader

Back to Clojure namespaces

Playing with namespaces

Creating a new namespace

Working with namespaces on the REPL

Testing in Clojure

Testing from the command line

Testing in IntelliJ

Summary

3. Interacting with Java

Using Maven dependencies

Clojure interop syntax

Creating an object

Calling an instance method

Calling a static method or function

Accessing inner classes

Writing a simple image namespace

Writing the tests

The let statement

Destructuring in Clojure

Sequential destructuring

Associative destructuring

Exposing your code to Java

Testing from Groovy

Proxy and reify

Summary

4. Collections and Functional Programming

Basics of functional programming

Persistent collections

Types of collections in Clojure

The sequence abstraction

Specific collection types in Clojure

Vectors

Lists

Maps

Sorted maps and hash maps

Common properties

Sets

Sorted sets and hash sets

Common properties

Union, difference, and intersection

Applying functional programming to collections

The imperative programming model

The functional paradigm

Functional programming and immutability

Laziness

Summary

5. Multimethods and Protocols

Polymorphism in Java

Multimethods in Clojure

Keyword hierarchies

isa?

parents

descendants

underive

A la carte dispatch functions

Protocols in Clojure

Records in Clojure

Summary

6. Concurrency

Using your Java knowledge

The Clojure model of state and identity

Promises

Pulsar and lightweight threads

Futures

Software transactional memory and refs

Atoms

Agents

Validators

Watchers

core.async

Why lightweight threads?

Goblocks

Channels

Transducers

Summary

7. Macros in Clojure

Lisp's foundational ideas

Macros as code modification tools

Modifying code in Java

Modifying code in Groovy

The @ToString annotation

The @TupleConstructor annotation

The @Slf4j annotation

Writing your first macro

Debugging your first macro

Quote, syntax quote, and unquoting

Unquote splicing

gensym

Macros in the real world

References

Summary

Index