val doubleIt: (Int) -> Int = { i: Int -> i * 2 }

val tripleIt: (Int) -> Int = { it * 3 }

fun mapIt1Long(i: Int, func: (Int) -> Int): List<Int> {
  val list = mutableListOf<Int>()
  for (v in (0..i)) {   // (0..i) is inclusive
    val w = func.invoke(v)
    list.add(w)
  }
  return list
}

fun mapIt1Short(i: Int, func: (Int) -> Int): List<Int> = (0..i).map(func)