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Clojure is an elegant language for a more civilized development experience.

A simple syntax means Clojure is quick to learn and a wide range of open source libraries provides a rapid way to build any kind of software. Designed as a hosted language, Clojure runs on many platforms including the Java Virtual Machine, GraalVM, Microsoft.Net, JavaScript engines. Simple host language interoperability provides access to libraries from a wide range of programming languages, further extending the reach of Clojure.

Clojure runs in a REPL process that provides instant feedback as code is written, encouraging experimentation and allowing designs to evolve rapidly and with confidence.

Clojure repl driven development using Clojure aware editor

About the book

Practicalli Clojure takes a hands on approach to learning to code with Clojure through the entire development workflow.

The REPL is the Clojure interactive environment used to create an run all code. You will quickly get a feel for Clojure by evaluating, breaking, fixing and extending code in the REPL, all the while getting instant feedback on what your code is doing.

As we work through code we will discuss the concepts behind Clojure, including functional programming, "pure" functions and a stateless approach with persistent data structures, changing state safely, Java interoperability and tooling around Clojure.

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Resources

Discussions and feedback

Contributions are welcome via GitHub issues and pull requests, or discuss the book on the Clojurians Slack community.

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Book re-write in progress

A re-write of this book is currently underway, so things may change and move around.

Last published: Mon Aug 03 2020 22:29:47 GMT+0100 (British Summer Time)


Quote: Adrian Cockcroft. Cloud Architect, Netflix

"A lot of the best programmers and the most productive programmers I know are writing everything in Clojure and swearing by it, and then just producing ridiculously sophisticated things in a very short time. And that programmer productivity matters." Adrian Cockcroft - Battery ventures, formally Cloud Architect, Netflix

Creative commons license

Practicalli Clojure by Practicalli Creative Commons Attribution Share-Alike 4.0 International

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