Question

How can I refactor this code in functional style (scala idiomatic)

def findFirst[T](objects: List[T]):T = {
  for (obj <- objects) {
    if (expensiveFunc(obj) != null) return obj
  }
  null.asInstanceOf[T]
}

Answer 1

This is almost exactly what the find method does, except that it returns an Option. So if you want this exact behavior, you can add a call to Option.orNull, like this:

objects.find(expensiveFunc).orNull