Equals

One welcome change in Scala is the change of semantics of the == operator. In Scala it is the same as doing a .equals comparison in Java. If you want identity comparison you can use the eq method (and ne for the not equal comparator).

Examples:

1. scala> case class Name(first:String, last:String)
2. defined class Name
4. scala> val jesse = Name("Jesse","Eichar")
5. jesse: Name = Name(Jesse,Eichar)
7. scala> val jesse2 = Name("Jesse","Eichar")
8. jesse2: Name = Name(Jesse,Eichar)
10. scala> val jody = Name("Jody","Garnett")
11. jody: Name = Name(Jody,Garnett)
13. scala> val jJames = Name("Jesse","James")
14. jJames: Name = Name(Jesse,James)
16. scala> jesse == jesse2
17. res0: Boolean = true
19. scala> jesse == jody
20. res1: Boolean = false
22. scala> jesse ne jesse2
23. res2: Boolean = true
25. scala> jesse eq jesse2
26. res3: Boolean = false