相关疑难解决方法(0)

I'm often writing code that compares two objects and produces a value based on whether they are the same, or different, based on how they are different.

So I might write:

val result = (v1,v2) match {
  case (Some(value1), Some(value2)) => "a"
  case (Some(value), None)) => "b"
  case (None, Some(value)) => "b"
  case _ = > "c"
}

Those 2nd and 3rd cases are the same really, so I tried writing:

val result = (v1,v2) match {
  case (Some(value1), Some(value2)) …