What is recommended to do when you have a case in a when where you want do to noting? Just empty {}?

# getting-started

[Kenneth]

What is recommended to do when you have a case in a when where you want do to noting? Just empty {}?

[Mykola Gurov]

Or just nothing? Do you mean a lambda for a NOOP (no operation)? I'd usually use empty braces indeed, e.g.

val operation: (InputValue)->Unit = {}

[Tobias Berger]

I suggest functionally empty braces with a comment like this:

when (a) {
  1 -> doSomething()
  2 -> { /* do nothing */ }
  3 -> throw MyException()
}

[Ruckus]

I do similar to @Tobias Berger, though I usually put the comment outside the braces:

when (a) {
  1 -> doSomething()
  2 -> {} // Do nothing
  3 -> throw MyException()
}

[ephemient]

I like writing Unit, more than {}, but it works the same