Kotlin Brain Teasers

Puzzle 22

Inside, Outside

src/commonMain/kotlin/com/example/puzzles/lambda/scope/PlotPoints.kt

data class Point(val x: Int, val y: Int)

fun createRoutePlan() = buildList {
  var x = 1
  for (y in 1..3) {
    add { Point(x, y) }
    x++
  }
}

fun main() {
  for (nextLocation in createRoutePlan()) {
    println("Robot is moving to: " + nextLocation())
  }
}

Guess the Output
	Try to guess the output (or error) before moving to the next page.

The program displays the following output:

Robot is moving to: Point(x=4, y=1)
Robot is moving to: Point(x=4, y=2)
Robot is moving to: Point(x=4, y=3)