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    person.also { p ->
        p.profession = "Iron Man"
        p.nickname = "Tony"
    }

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    person.also {
        it.profession = "Iron Man"
        it.nickname = "Tony"
    }

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    person.apply {
        this.profession = "Iron Man"
        this.nickname = "Tony"
    }

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    val person: Person = with(attributes) {
        mapToPerson(this.first, this.second)
    }

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    val person: Person = attributes.run {
        mapToPerson(this.first, this.second)
    }

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    val person: Person = attributes.let {
        mapToPerson(it.first, it.second)
    }

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fun printAnimalsOf(house: House) =
        when (house) {
            is Stark -> {
                val wolves = house.wolves()
                println(wolves)
            }
            is Targeryen -> {
                val dragons = house.daenerysDragons()
                println(dragons)
            }

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interface House

class Stark : House{
    fun wolves() = arrayListOf("Ghost", "Grey Wind", "Summer", "Lady", "ShaggyDog", "Nymeria")
}

class Targeryen : House{
    fun daenerysDragons() = arrayListOf("Drogon", "Viserion", "Rhaegal")
}

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enum class Color {
    RED, ORANGE, YELLOW, GREEN, BLUE, INDIGO, VIOLET
}

fun mix(firstColor: Color, secondColor: Color) =
        when (setOf(firstColor, secondColor)) {
            setOf(Color.RED, Color.YELLOW) -> Color.ORANGE
            setOf(Color.YELLOW, Color.BLUE) -> Color.GREEN
            setOf(Color.BLUE, Color.VIOLET) -> Color.INDIGO
            else -> throw Exception("bla color")

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fun showIsGreatHouse(house: House) =
        when (house) {
            House.TARGARYEN, House.LANNISTER, House.STARK -> "$house is a great house"
            else -> "bla"
        }

fun main(args: Array<String>) {
    println(showIsGreatHouse(House.LANNISTER))
    // LANNISTER is a great house
}