package com.example.puzzles.logic.copy

data class Event(
  val name: String,
  val location: String,
  val guests: Int,
  val speakers: ArrayList<String> = ArrayList()
)

fun main() {
  val dayOne = Event("KotlinConf, Day 1", location = "TBC", guests = 2000)

  val dayTwo = dayOne.copy(name = "KotlinConf, Day 2")

  dayOne.speakers.addAll(listOf("Hadi", "Andrey", "Sebastian"))
  dayTwo.speakers.addAll(listOf("Roman", "Svetlana", "Dmitry"))

  println("Day 1: ${dayOne.speakers}")
  println("Day 2: ${dayTwo.speakers}")
}