Kotlin Standard Library Cookbook

There's more...

Because of the fact that properties in destructured object assignments are position-based, sometimes we are forced to declare more variables than we want to use. We can use an underscore if we don't need to use a certain value, avoiding the compiler hint indicating an unused variable and simplifying the code a bit:

val (_, turnedOn) = LightBulb(1)print("Light bulb is turned ${if (turnedOn) "on" else "off"}")

Destructuring is also available for function return values:

val (login, domain) = "[e-mail]".split("@")print("login: $login, domain: $domain")

The preceding code is going to return the following output:

login: agata, domain: magdalena.com

We can also use destructured declarations with lambda expressions:

listOf ...