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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enums and Objects

Garrick Henne
Garrick Henne
3,868 Points
Posted by Garrick Henne
Garrick Henne
3,868 Points

What does the the move(_ direction: Direction) method output? Why does it still work without one?

I am trying to figure out what the function is supposed to output, i thought it would be -> Point or location but those dont seem to work. But when i complete the function with the output being empty it still works somehow anyway, why is this?

test.swift 
class Point {
    var x: Int
    var y: Int

    init(x: Int, y: Int) {
        self.x = x
        self.y = y
    }
}

enum Direction {
    case left
    case right
    case up
    case down
}

class Robot {
    var location: Point

    init() {
        self.location = Point(x: 0, y: 0)
    }

    func move(_ direction: Direction) {
        // Enter your code below
    }
}

1 Answer

Clark Reilly
Clark Reilly
6,204 Points
Clark Reilly
Clark Reilly
6,204 Points

It shouldn't output anything. It should only change the values of Robot

func move(_ direction: Direction) /* -> nil/void/zip/nada */ {
  switch direction
  case right: location.x += 1
  //You can do the rest from here.
}