Match “fallthrough”: executing same piece of code for more than one case?

Question

What is the Scala\'s way to write the following code:

 int i;

 switch(i) {
   case 1:  
         a();
         break;

   case 2:
   case 15:
        b();
          


        

Answer 1

Case statements can actually include additional logic guards using a standard if statement. So you could do something like:

i match {
  case x if x == 1 => a
  case x if (x == 2 | x == 15) => b; c;
  case _ => foo
}

The matching guards can be any boolean function or composition of functions, so it gives it a lot more power than the standard switch statement in Java.