Brief Introduction to Clojure

1. Clojure Intro
Misha Kozik
@mishadoff

2. Yet Another JVM Language?

3. Rationale
A Lisp
for Functional Programming
symbiotic with an Established Platform
designed for Concurrency
­ Rich Hickey

4. Clojure Philosophy

5. Clojure Philosophy

6. Lots of Irritating Stupid Parentheses
(defn concat [xs ys]
(if (empty? xs) ys
(let [[h & t] xs]
(cons h (concat t ys)))))

7. LISt Processing
(defn concat [xs ys]
(if (empty? xs) ys
(let [[h & t] xs]
(cons h (concat t ys)))))

8. LISt Processing
(defn concat [xs ys]
(if (empty? xs) ys
(let [[h & t] xs]
(cons h (concat t ys)))))

9. LISt Processing
(defn concat [xs ys]
(if (empty? xs) ys
(let [[h & t] xs]
(cons h (concat t ys)))))

10. (+ (* 2 5)
(/ 1 7))
Prefix notation
Do you speak it?

11. Syntax
Code Mode:
Data Mode:
Special Mode:
'(1 2 3 4)
(+ 1 2 3 4)
(def a 42)

12. Quick Tour
● Value
● Function
● Scope
● List
● Vector
● Map
● Set
● Functional Features
● Automatic Promotion
● Destructuring
● Loop/Recur
● Time
● Memoization
● Lazy Sequences
● Threading macro
● Meta
● IO
● Regexps
● Record
● Protocol
● Type Hints
● Multimethods
● Exceptions
● Macro
● Concurrency
● Java­>Clojure
● Clojure­>Java
● Bonus!

13. Demo
jug.clj
http://goo.gl/oI7joI

14. IDE

15. IDE
VimClojure
LightTable
Counter Clockwise
Enclojure
La Clojure

16. Infrastructure
● Leiningen, Clojars
● Ring, Compojure, Enlive
● ClojureScript
● Pedestal
● Seesaw
● Datomic, Korma, Carmine, Monger
● Overtone, Incanter
● core.logic, core.match, core.async
● AppEngine, Heroku
● Write your own wrapper!

17. Getting Started
● Official website
● Clojure Docs
● Try Clojure
● 4clojure
● Comprehensive clojure overview
● Planet Clojure
● Learn Clojure
● StackOverflow questions
● GitHub repositories
● My Blog

18. Books

19. Q?