Computer scienceProgramming languagesKotlinObject-oriented programmingObject-oriented programming features

Delegate

Questionable conventions

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You've been given the following code with questionable naming conventions.

interface foo {
    fun printMessage()
}

class bar(val x: String) : foo {
    override fun printMessage() {
        print(x)
    }
}

class baz(base: foo) : foo by base {
    override fun printMessage() {
        print("Hello Kotlin")
    }
}

fun main() {
    val b = bar("Hello Delegate")
    baz(b).printMessage()
}

Can you identify all of these elements?

Match the items from left and right columns

foo

bar

baz

baz(b).printMessage()

Interface implemented by delegate

Basic implementation of the interface

Class which utilizes delegate

Passing delegate to the constructor

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