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

While not applicable here, for more complex problems you can 'fallthrough' in a sense using the andThen function on partial functions.

 def do_function_a() { println("a"); }
 def do_function_b() { println("b"); }
 val run_function:PartialFunction[String, String] = { 
       case "a" => do_function_a(); "b"
       case "b" => do_function_b(); "c"
 }

 (run_function andThen run_function)("a") // a\nb