Kotlin Standard Library Cookbook

Destructuring types

It is often practical to convert a single object of a complex type into a number of variables. This allows you to provide proper naming for the variables and simplifies the code. Kotlin provides an easy, built-in way to achieve this with a feature called destructuring:

data class User(val login: String, val email: String, val birthday: LocalDate)fun getUser() = User("Agata", "[e-mail]", LocalDate.of(1990, 1, 18))val (name, mail, birthday) = getUser()print("$name was born on $birthday")

As a result, this piece of code would print the following message to the console:

Agata was born on 1990-01-18

Pretty awesome! Destructuring is available for data classes out of the box. The Kotlin standard library provides this feature ...