Question

I have a variable that I want to declare like:

val foo : Baz

for (s <- barList) {
 if s.tag == "java"
   foo = s
}

Once foo is assigned a value, foo cannot be reassigned. From this perspective foo is of type val and not var. But above is not valid scala code as scala forces to assign a value at the declaration time. Even if I use var, scala forces me to assign a value. Is there a better solution? The reason I would like val is because it results in better performance and val semantics fits in above scenario.

Answer 1

I’d do something like this:

val foo: Baz = barList.find(_.tag == "java").getOrElse( /* provide default here */)