Example of Function Interface (SAM)

FunctionInterfaceSAM

fun interface Translatable {

    fun translate(
        fromLanguage: Language,
        fromText: String,
        toLanguage: Language
    ): String

    fun whackamole() {
        println("whackamole")
    }
}

suspend fun scheduleTranslate(
    delay: Long = 0,
) : Translatable {
    
    var fromText1: String

    delay(delay)

    return Translatable { fromLanguage, fromText, toLanguage ->
        fromText1 = fromText
        fromLanguage.langName + " " + fromText + " " + toLanguage
    }

    // use object instead of lambda
    //return object : Translatable {
    //    override fun translate(
    //        fromLanguage: Language,
    //        fromText: String,
    //        toLanguage: Language
    //    ): String {
    //        return fromLanguage.langName+" "+fromText+" "+toLanguage
    //    }
    //}
}

fun main() {

    println("Starting...")
    runBlocking {
        val x = scheduleTranslate(1000)

        println(
            x.translate(
                Language.ENGLISH,
                "Hello",
                Language.GERMAN
            )
        )
        println(
            x.whackamole()
        )
    }
}