import kotlin.random.Random

fun main(args: Array<String>) {
    val quizCreator = QuizCreator()
    quizCreator.makeQuiz()
}

class QuizCreator {
    private val quizInstance = Quiz("", listOf())

    fun makeQuiz() {
        println("Choose quiz name:")

        quizInstance.quizName = readLine().toString()

        while (true) {
            println("New Question? (Y/n)")

            if (readLine()?.lowercase() == "y") {
                var question = Question(null, null)

                println("Question name?")

                question.questionText = readLine()

                println("Question answer?")

                question.questionAnswer = readLine()

                quizInstance.questions.toMutableList().add(question)

                println(quizInstance.questions[0])
            } else {
                println("OK")
                quizInstance.startQuiz()
                break
            }
        }
    }

}


data class Quiz(var quizName: String, val questions: List<Question>) {
    fun startQuiz() {
        for (question in questions) {
            println(question.questionText)

            val answer = readLine()

            if (answer?.lowercase() != question.questionAnswer?.lowercase()) {
                println("Incorrect, the answer was ${question.questionAnswer}")
            } else {
                println("Correct")
            }
        }
    }
}

data class Question(var questionText: String?, var questionAnswer: String?)

ok so I have this code, and for some reason when running this it's saying that the list of questions is empty:

Choose quiz name:
j
New Question? (Y/n)
y
Question name?
j
Question answer?
j
Exception in thread "main" java.lang.IndexOutOfBoundsException: Empty list doesn't contain element at index 0.
	at kotlin.collections.EmptyList.get(Collections.kt:36)
	at kotlin.collections.EmptyList.get(Collections.kt:24)
	at QuizCreator.makeQuiz(Main.kt:32)
	at MainKt.main(Main.kt:5)

Process finished with exit code 1

why is this in #server? anyway,

.toMutableList()

creates a new list, and mutating it does nothing to the original