Curly braces in Scala method call [duplicate]

Answer 1

In addition to (regular) functions and by-name arguments, braces also help with partial functions:

processList(l) {
  case Nil => ...
  case h :: t => ...
}

and sequences of expressions:

doSomething {
  thing1;
  thing2
}

Note that (thing1; thing2) is not a valid expression in Scala like it would be in, say, ML.