kajetan-suchanski

class Ads {
    fun display() {
        Log.i("Ads", "The view was beautifully decorated with several ads")
    }
}

kajetan-suchanski

class Analytics {
    fun analyze() {
        Log.i("Analytics", "Your private data was obtained anonymously")
    }
}

kajetan-suchanski

class Drive {
    fun sync() {
        Log.i("Drive", "The drive has been synchronized")
    }
}

kajetan-suchanski

class ListItem<ItemType>(val item: ItemType, val printer: AbstractItemPrinter<ItemType>)

abstract class AbstractItemPrinter<ItemType> {
    abstract fun print(item: ItemType)

    @Suppress("UNCHECKED_CAST") // It is a safe cast... when used properly ;)
    fun delegatePrint(item: Any?) {
        print(item as ItemType)
    }
}

kajetan-suchanski

class Cat {
    fun meow() {
        println("Meow?")
    }
}

class ThisClass

fun classCheckExample() {
    val listOfAny = listOf<Any>(ApplePie(), Cheesecake(), Coffee(), Cat(), ThisClass())

kajetan-suchanski

interface Consumable {
    fun consume()
}

class ApplePie : Consumable {
    override fun consume() {
        println("Yummy apple pie!")
    }
}

kajetan-suchanski

class ApplePie
class Cheesecake
class Coffee

fun listOfAnyExample() {
    val listOfAny = listOf<Any>(ApplePie(), Cheesecake(), Coffee())
    listOfAny.forEach { println("I am ${it.javaClass.simpleName}.") }
}

kajetan-suchanski

const c = false && "true" // === false && "false"
const h = "true" && false // === "false" && false
const a = true && "true"
const o = "true" && true
const t = true && "false"
const i = "false" && true
const k = [c, h, a, o, t, i]
for(let result of k)
    console.log(`${typeof result} ${result}`)