Computer scienceProgramming languagesKotlinObject-oriented programmingObject-oriented programming usage

Destructuring declarations

Underscore

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Sam is an intern in a big company. Yesterday he found a complicated piece of code, which uses strange underscore characters.

data class Customer(val firstName: String, val lastName: String, val age: Int, val city: String)

class CustomerFilter {
    fun showCustomers(customers: MutableList<Customer>) {
        for ((p1, _, p3) in customers) {
            if (p3 in 18..27) println(p1)
        }
    }
}

As you can see, the CustomerFilter performs some filters under the array of customers. Let's help Sam understand what is going on in the showCustomers function.

Select one option from the list

The function prints all customers names

The function returns all customers' names by age between 18 and 27

The function returns all customers' names by index between 18 and 27

The function prints all customers' names by age between 18 and 27

The function prints all customers' names by index between 18 and 27

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