Kotlin：如何从范围中返回一些价值？

Question

In Scala I can write something like this:

val something = {
  val temp1 = ...
  val temp2 = ...
  temp1 + temp2
}

As far as I know the best way to do the same in Kotlin is:

val something = {
  val temp1 = ...
  val temp2 = ...
  temp1 + temp2
}()

Actually it's a lambda with type Unit -> Int which is called immediately. I wonder could this code be improved somehow? Maybe there is a built in function which allows me to write val something = block { ... } or something like this?

Answer 1

You can use function run , like:

val something = run {
  val temp1 = ...
  val temp2 = ...
  temp1 + temp2
}