TestLambdas.kt

gistfile1.txt

fun main(args: Array<String>) {
    val callbacksList = mutableListOf<(HttpResponse) -> Unit>()

    // Adicionando um método estático
    callbacksList.add(::printResponse)

    // Adicionando um callback anônimo
    val anonymousCallback = { httpResponse: HttpResponse ->
        println("Response code from anonymous callback: ${httpResponse.code}")
    }

    callbacksList.add(anonymousCallback)

    // Adicionando um callback de uma classe
    val listener = ResponseListener()

    callbacksList.add(listener::onResponse)

    val response = HttpResponse(200)

    for (callback in callbacksList) {
        callback(response)

        // ou
        //callback.invoke(response)
    }

}

fun printResponse(httpResponse: HttpResponse) {
    println("Response code: ${httpResponse.code}")
}

data class HttpResponse(val code: Int)

class ResponseListener {
    fun onResponse(httpResponse: HttpResponse) {
        println("Response code from class listener: ${httpResponse.code}")
    }
}