Talk given at the Aalto University

1. JAVASCRIPT
Monday, April 11, 2011

2. Me, Myself and I
Mobisoft / StrataGen / DDS TUT
Senior Software Architect Researcher
Ph.D. student
Monday, April 11, 2011

3. JavaScript
Groke
Frameworks
Monday, April 11, 2011

4. JavaScript:
The World's Most Misunderstood
Programming Language
Monday, April 11, 2011

5. “JavaScript is the most popular programming language
in the world”
Monday, April 11, 2011

6. “JavaScript is the most popular programming language
in the world”
...“but it’s also the least popular programming language
in the world”
- Douglas Crockford
Monday, April 11, 2011

7. The (mis)conception
“It’s a toy language”
“Even designers can do it”
“What good is a scripting language anyway”
Monday, April 11, 2011

8. The (mis)conception
“It’s a toy language”
“Even designers can do it”
“What good is a scripting language anyway”
Strong Typing vs. Strong Testing
Monday, April 11, 2011

9. The Culprit
Monday, April 11, 2011

10. “Programmers are artists and they
don’t want anybody to mandate
which language to use”
Monday, April 11, 2011

11. “Programmers are artists and they
don’t want anybody to mandate
which language to use”
“Lisp in C’s Clothing”
Monday, April 11, 2011

12. “Programmers are artists and they
don’t want anybody to mandate
which language to use”
“Lisp in C’s Clothing”
Pitfalls in the Language
Monday, April 11, 2011

13. “Programmers are artists and they
don’t want anybody to mandate
which language to use”
“Lisp in C’s Clothing”
Pitfalls in the Language
Typecasting
Monday, April 11, 2011

14. The Jungle
ECMAScript
JavaScript
JScript
ActionScript
Huh?
Monday, April 11, 2011

15. The Jungle
ECMAScript
JavaScript JScript ActionScript
Monday, April 11, 2011

16. Mocha
Monday, April 11, 2011

17. Mocha
LiveScript
Monday, April 11, 2011

18. Mocha
LiveScript
JavaScript
Monday, April 11, 2011

19. Mocha
LiveScript
JavaScript
JScript
Monday, April 11, 2011

20. Mocha
LiveScript
JavaScript
ECMAScript JScript
Monday, April 11, 2011

21. Mocha
LiveScript
JavaScript
ECMAScript JScript
1,2,3
Monday, April 11, 2011

22. Mocha
LiveScript
JavaScript
ECMAScript JScript
1,2,3
ActionScript
Monday, April 11, 2011

23. Mocha
LiveScript
JavaScript
ECMAScript JScript
1,2,3
ActionScript
ES4?
Monday, April 11, 2011

24. Mocha
LiveScript
JavaScript
ECMAScript JScript
1,2,3
ActionScript
ES4?
ES 3.1 ES Harmony
Monday, April 11, 2011

25. JavaScript as a general-
purpose programming
language?
Monday, April 11, 2011

26. Monday, April 11, 2011

27. The Pioneers
Helma
Phobos
Jaxer
KDE scripting
Mac Dashboard widgets
Google Desktop gadgets
Monday, April 11, 2011

28. The Pioneers
Helma
Phobos
Jaxer
KDE scripting
Mac Dashboard widgets
Google Desktop gadgets
Monday, April 11, 2011

29. DOM Rhino V8
JS JS JS
Java C++
Browser JVM OS
Monday, April 11, 2011

30. Common Ground?
Monday, April 11, 2011

31. Common Ground?
January 29th, 2009
Monday, April 11, 2011

32. Common Ground?
January 29th, 2009
ServerJS
Monday, April 11, 2011

33. Common Ground?
January 29th, 2009
ServerJS
CommonJS
Monday, April 11, 2011

34. CommonJS
Module system (exports/require)
Package system
Module APIs (file, socket, binary, ...)
Web server interface - JSGI
Promises
Workers
Monday, April 11, 2011

35. Implementations
Narwhal
CouchDB
Persevere
RingoJS
SproutCore
node.js
v8cgi
Flusspferd
Monday, April 11, 2011

36. Why should I care?
A single programming language for the client and the
server
Code reuse and testing
Many developers are already familiar with JavaScript
The browser wars has spawned extremely fast
JavaScript interpreters
Monday, April 11, 2011

37. Further
JavaScript: The Good Parts
http://wiki.commonjs.org/wiki/CommonJS
http://narwhaljs.org/
Monday, April 11, 2011