Quick Answer

Convenient way to extract multiple values at once

Understanding the Issue

Destructuring declarations allow you to unpack an object into multiple variables in one statement. Data classes automatically provide componentN() functions for destructuring.

The Problem

This code demonstrates the issue:

Kotlin Error 
// Problem: Manual property access
val person = Person("Alice", 30)
val name = person.name
val age = person.age

The Solution

Here's the corrected code:

Kotlin Fixed 
// Solution: Destructuring
val (name, age) = Person("Alice", 30)

// Also works with maps:
val map = mapOf("a" to 1, "b" to 2)
for ((key, value) in map) {
    println("$key -> $value")
}

Key Takeaways

Use destructuring for cleaner code when working with compound values.