A intro to clojure talk ~ 1.5 hours with lots of demos in light table and the repl (console).

1. Intro to Clojure
For programmers

2. • a dialect of LISP
• Runs on JVM, CLI, Javascript
• Functional
• Immutable
• Designed by Programmers for
Programmers
Rich Hickey
created in 2007
What is it?

3. Syntax
• Keyword ... :a :b
• Symbol ... println
• String ... "Hi Mom"
• Integer ... 42

4. List All The Things
• Everything is a list with ( )
• (function-name
parameter parameter)
• (println "hello world")
• (+ 1 2)

5. Data Structures
• Vector (collection)
• [1 2 3]
• Map (hash)
• {:a 1 :b 2 :c 3}
• Set (unique collection)
• #{1 2 3 }

6. ( ) aren’t that bad!

7. nREPL
• Sort of like IRB/Pry for ruby,
but better
• Built in to Light Table
• Add-in for Emacs, Sublime
and others

8. Cool Libraries
• OM - Facebook react
library
• compojure - websites
• korma - object relation
mapper for databases
• play-clj - game library

9. More Cool Things
• quil - a wrapper around Processing
for drawing/animation
• overtone - playing musical tones
• synaptic - neural networks
• cascalog - data processing
• datomic - query engine built on top
of database storage

10. The tooling

11. Leiningen
for automating
Clojure projects
without setting
your hair on fire
1. Download the lein script (or on Windows lein.bat)
2. Place it on your $PATH where your shell can find it
3. Set it to be executable (chmod a+x ~/bin/lein)
4. Run it (lein) and it will download the self-install
package

12. lein new app my-stuff
$ cd my-stuff
$ find .
.
./.gitignore
./doc
./doc/intro.md
./LICENSE
./project.clj
./README.md
./resources
./src
./src/my_stuff
./src/my_stuff/core.clj
./test
./test/my_stuff
./test/my_stuff/core_test.clj

14. • install dependancies
lein deps
• create projects
lein new app my-stuff
• start a repl
lein repl
Oh the things it can do….

15. Austin ClojureBridge
• March 13, 14
• Rackspace North Campus
• Friday night install fest 6pm-8pm
• Saturday workshop 9am-3:30pm
• Saturday night after party at Pinballz
Arcade
• Food/beverages provided by sponsors
• Sponsors: Rackspace, DRW, Pragmatic

16. 40% off print,
50% off digital
see Nola
for code

17. Live Coding