is there a way to name case in `when`, so that i c...

# getting-started

[Ivan Brko]

is there a way to name case in when, so that i could write something like this:

when (expression generating nullable){
  null -> handle null
  x    -> handle x for which compiler knows its not null anymore
}

[Joffrey]

Extract the expressions on the right into functions with meaningful names

[Joffrey]

Maybe I misunderstood your question, if you want to name x you can do so inside the `when`:

when(val x = expression)

[Ivan Brko]

ok, that's what i was wondering, thx

[wbertan]

Yes, you can:

fun maybe(): String? = null

fun asas() {
    when (val maybe = maybe()){
        null -> println("it was null!")
        "something" -> println("maybe is something! Check: $maybe")
        else -> println("I don't know what it is! Check: $maybe")
    }
}

[Ivan Brko]

thx both! 👍 👍 👍
i much prefer that (being able to write the whole thing as a single expression) than having to first assign value to x and do if/else on it