Video and slides synchronized, mp3 and slide download available at http://bit.ly/1bhByBw. Kurt Schrader explores patterns and practices used to build polyglot projects, when to add a new language and what to do when things seem to get out of hand.Filmed at qconnewyork.com. Kurt Schrader is CTO at Intent Media.

1. Building Polyglot
Projects
Kurt Schrader
@kurt

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3. Presented at QCon New York
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Strategy
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Highlights
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- held in 9 cities worldwide

4. Who am I?

7. Polyglot
Programming

8. What can I talk
about?

10. Who’s a polyglot?

11. We’re all
Polyglots

12. SQL

13. SQL

14. SQL

15. pol•y•glot, adj.
containing, composed of, or written in
several languages.

16. pol•y•glot, n.
a mixture or confusion of languages

17. Polyglot projects?

18. Project

20. Why?

21. “In business, there is nothing more
valuable than a technical advantage
your competitors don't understand.”
-Paul Graham

22. Where to start?

24. Use the JVM

26. “I've never met anyone who has mastered
Ruby or Clojure and had the opinion that
they are more productive in Java.”
- Jay Fields

36. Other advantages
of the JVM?

37. Libraries

38. Weirdness

40. Tools

42. Monitoring

43. Testing and CI

44. Deployment

45. Profiling

46. Project
Architecture

47. - Use Common
Data Types

49. struct User {
1: string name,
2: string password
}

50. • C++
• C#
• Cocoa
• D
• Delphi
• Erlang
• Haskell
• Java
• OCaml
• Perl
• PHP
• Python
• Ruby

51. - Build small
components

52. Try things out

53. Be ready to throw
things away

54. - Dependency
Injection

56. <lang:jruby id="rubyHello"
script-interfaces="com.intentmedia.HelloListener"
script-source="classpath:com/intentmedia/hello.rb">
<lang:property name="prefix" value="Ruby says: " />
</lang:jruby>

57. package com.intentmedia;
public interface HelloListener {
public void receiveSubject(String subject);
}

58. class Hello
def setPrefix(p)
@prefix = p
end
def receiveSubject(s)
puts "#{@prefix} Hello #{s}"
end
end
Hello.new

59. Anti-patterns

60. Multiple languages
in one file

61. Spaghetti
Language

62. Questions?