Intro to Clojure 4 Developers
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This document provides an introduction to Clojure, including that it is a Lisp dialect that runs on the JVM, CLI, and JavaScript. It is functional and immutable. Key aspects of Clojure covered include its syntax using keywords and lists, common data structures like vectors and maps, and tools like Leiningen for managing Clojure projects. Popular Clojure libraries and applications are also mentioned.
![Data Structures
• Vector (collection)
• [1 2 3]
• Map (hash)
• {:a 1 :b 2 :c 3}
• Set (unique collection)
• #{1 2 3 }](https://image.slidesharecdn.com/introtoclojure4developers-150211223156-conversion-gate01/85/Intro-to-Clojure-4-Developers-5-320.jpg)
Intro to Clojure 4 Developers
- 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
Editor's Notes
- #3: LISP second language made After Fortran
- #9: OM is a wrapper around the Facebook React library Compojure is somewhat like ruby Rack Korma is a ORM, where you can create entities and have easy access to data, awesome play-cli is a wrapper around libGDX, desktop, mobile apps quil - creates graphics and animations synaptic - neural networks used for machine learning casalog - query language for hadoop datomic - a database, which separates storage from queries in a unique way
- #10: Ever heard of processing? its a graphics library kind of neat Variety of problem domains for Clojure
- #16: First Workshop, there will probably be more :) Should have about 6 months experience