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Start your free trialCarlos Mendez
2,646 PointsI am not sure how to increase or decrease the location stored property of the Robot class.
Hi there!
I am blanking out and not sure how to implement the method for Robot using the Enum. I am not really sure how I can add or subtract one to Point by applying each member of the enum.
I tried it with an if statement, which I figured wouldn't work.
Thanks!
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) -> Point {
switch direction {
case Direction.down: return Point(x: 0, y: -1)
case Direction.up: return Point(x: 0, y: 1)
case Direction.right: return Point(x: 1, y: 0)
case Direction.left: return Point(x: -1, y: 1)
}
}
}
1 Answer
KRIS NIKOLAISEN
54,971 PointsSome hints:
1) The move function doesn't return anything. It just updates the current location.
2) location.x
stores the current x coordinate for Robot. So
location.x = location.x + 1
or
location.x += 1
would move 1 step to the right.
Carlos Mendez
2,646 PointsCarlos Mendez
2,646 PointsThank you!