The document summarizes Clojure, a functional programming language that runs on the JVM and JavaScript virtual machines. It notes that Clojure is strongly typed, functional, immutable, and allows macros and runtime polymorphism. It then discusses Clojure adoption in Finland, providing examples of startups and consultancies using it. Finally, it recommends some resources for learning Clojure, including books and online courses.

1. Craft Beer & Clojure
2.11.2017

2. The Beer!

3. Clojure
• Strongly typed, dynamic language
• Functional & immutable at the core
• Homoiconic (code is data)
• Macros & runtime polymorphism
• REPL Workflow
• Main targets are JVM & JS
– Thank you for all the libs :)

4. Why Clojure?

5. Adrian Cockcroft
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.
http://thenewstack.io/the-new-stack-makers-adrian-cockcroft-on-sun-netflix-clojure-go-docker-and-more/

6. :stats
(1.5y project, 5+ developers)

10. Clojure in Finland
• Lot’s of startups using Clojure(Script)
• Many public sector projects written in Clojure
• Most software consultancies use it (Metosin, Solita,
Siili, Reaktor)
– Edge in both recruiting & gigs
• Active meetup groups & ClojuTRE
• Twitter: https://twitter.com/clojurefinland
• Slack: https://clojurians.herokuapp.com

11. So, what’s the language like?

12. Game of Life
http://clj-me.cgrand.net/2011/08/19/conways-game-of-life/

13. Demo time

14. Getting started
• Books:
– Clojure Programming
– The Joy of Clojure, 2nd
– Web Development with Clojure, 2nd
• Online
– 4clojure (https://www.4clojure.com/)
– ClojureDocs (http://clojuredocs.org/)
– FP with Clojure (http://mooc.cs.helsinki.fi/clojure)
– Brave Clojure (https://www.braveclojure.com/)

15. Thanks.
Tommi Reiman / @ikitommi
http://www.metosin.fi

16. Bonus Slides