1. SCALA fra newbie til ninja på en time Nina Heitmann nina.heitmann@iteraconsulting.no @ninaheitmann Karianne Berg karianne@miles.no @karianneberg

2. publicclass Dog { private final String name; private intage; public Dog(String name, int age) { this.name = name; this.age = age; } public String getName = { return name; } publicint getAge = { return age; } public void setAge(int age) { this.age = age; } public void bark() { System.out.println(”woof woof!”); } }

3. class Dog(val name : String, var age : Int){ def bark = println(”Woof woof!”) }

4. object DateUtil { def formatDate = { ... } }

5. class Dog (val name : String, varage : Int) object Dog { def maximumAge = 12 }

6. class Dog(val name : String, var age : Int) class Dog(val name : String, var age : Int) { println(”Creating Dog”) } class Dog(val name : String, var age : Int) { def this(name : String) = this(name, 10) // Kompileringsfeil def this(name : String) = println(”Dog!”) } class Dog private(val name : String, var age : Int)

7. var name : String = "Harald" var name = "Harald" name = 6// Kompileringsfeil

8. def square(x : Int) : Int = { x*x } // Int def square(x : Int) = x*x // Int def square(x : Int) { x*x } // Unit(!)

9. 2+3 2.+(3)

10. val num = 8// Int val isValid = true// Boolean

11. for(Integer element : list) { System.out.println(element); } list.foreach(element => println(element) )

12. for(Integer element : list) { System.out.println(element); } list.foreach(element => println(element) ) list.foreach(println(_))

13. val list = List(1, 2, 3, 4, 5) list.filter(element => element < 3) // List(1, 2) list.filter(_ < 3) // List(1, 2)

14. int sum = 0; for(Integer current : list) { sum += current; } val list = List(1, 2, 3, 4, 5) list.foldLeft(0) { (sum, current) => sum + current} // 15

15. int sum = 0; for(Integer current : list) { sum += current; } val list = List(1, 2, 3, 4, 5) list.foldLeft(0) { (sum, current) => sum + current} // 15 list.foldLeft(0) {_ + _} // 15 sum 0 Integer current sum += current; 0 sum current sum + current

17. DON’T TRY THIS AT HOME! http://www.flickr.com/photos/94507863@N00/1108110035

18. Scala 2.8.0 9.0.3 + siste plugin!

19. Byggeverktøy Maven Simple Build Tool (SBT)

21. http://www.github.com/karianne - sbt-minimal-example - mvn-minimal-example

22. http://www.scala-lang.org http://scala.java.no http://www.google.com 

24. Onsdag 13:00 Pattern matching Onsdag 14:15 Akka Torsdag 13:00 Lift Torsdag 17:00 Actors i produksjon

25. 16.-17. november i Oslo www.smidig2010.no

26. Karianne Berg karianne@miles.no @karianneberg Nina Heitmann nina.heitmann@iteraconsulting.no @ninaheitmann