Kotlin List Objects to List Id's

Question

I have a list of objects Human. I need to get a list of its id. I do that. Can i do it more simplier? It looks not so good

  val idsList = ArrayList<Int>()
humansList.forEach{idsList.add(it.id)}

Answer 1

You can simply map ids from humanList to idsList

val idsList = humalList.map { it.id }