Challenge 3: Destructuring a Map — Solution

data class Product(val name: String, val price: Double)

fun main() {
    val item = Product("Keyboard", 49.99)
    val (name, price) = item
    println("$name costs $price")

    val catalog = mapOf(
        "Keyboard" to 49.99,
        "Mouse" to 19.99,
        "Monitor" to 179.99
    )

    for ((productName, productPrice) in catalog) {
        println("$productName: $productPrice")
    }
}

/*
Output:
Keyboard costs 49.99
Keyboard: 49.99
Mouse: 19.99
Monitor: 179.99

Notes:
- val (name, price) = item destructures the Product data class using its
  auto-generated component1()/component2() functions, mapped to the
  constructor's property order (name, then price).
- The for ((productName, productPrice) in catalog) loop destructures each
  Map.Entry the same way — the variable names on the left don't need to
  match the Map's own key/value naming, only the position does.
*/