Clojure

Clojure resources

Books

• Clojure Made Simple - a very light introduction to Clojure
• Clojure, Practical.li - a practical guide to learning Clojure programming (work in progress)

Essentials

• Leiningen - Build Automation for Clojure

Editors / IDE’s

• LightTable - modern development environment for Clojure, ClojureScript & JavaScript
• NightCode - designed to teach Clojure
• Emacs & Emacs Live - powerful development environment used by many Clojure developers

Videos

• The Clojure Language by Brian Will
• London Clojurians SkillsMatter webcasts
• Clojure in 10 bits - cant remember the actual name… doh
• Clojure for Java Programmers Part 1 - Rich Hickey

What is Clojure ?

Clojure is a modern dialet of the programming language LISP, running on the Java Virtual Machine and encouraging a functional approach to software development.

What makes a programming language functional ?

A functional programming language has several properties

• Functions evaluate to values
  As every function evaluates to a value, then you can use a function as a parameter to another function. In clojure we refer to this as first class functions.

• Imutability

Imutability means that things do not change. When thinking about state, this means that once a data structure or variable is defined, you cannot change its value. For example in Java, it would be like declaring all your data structures as final.

• Funtions return a value (First order function)

When a function is evaluated it will alway return a value

Why Clojure

Beautiful language syntax
Highly productive language
Easy to write readable code (especially using doto / threading macros -> –>)
Writing scalable code easier
Immutability - keeping code more deterministic - no side effects
World of Java & other JVM libraries available

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