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Start your free trialMackenzy Douyon
iOS Development Techdegree Student 2,913 Pointsneed help with this
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
switch direction {
case .Up:
return location.y += 1
case .Down:
return location.y -= 1
case .Right:
return location.x += 1
case .Left:
return location.x -= 1
}
}
}
// posible solution #2 /* switch direction { case .Up: location.y++ case .Down: location.y-- case .Right: location.x++ case .Left: location.x-- } */
// posible solution #3
/* switch direction { case .Up: self.location.y += 1 case .Down: self.location.y -= 1 case .Left: self.location.x -= 1 case .Right: self.location.x += 1 } */
/* switch direction { case .Up: return location.y += 1 case .Down: return location.y -= 1 case .Right: return location.x += 1 default: return location.x -= 1 } */
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
switch direction {
case .Up:
return location.y += 1
case .Down:
return location.y -= 1
case .Right:
return location.x += 1
case .Left:
return location.x -= 1
}
}
}
// posible solution #2
/*
switch direction {
case .Up:
location.y++
case .Down:
location.y--
case .Right:
location.x++
case .Left:
location.x--
}
*/
// posible solution #3
/*
switch direction {
case .Up:
self.location.y += 1
case .Down:
self.location.y -= 1
case .Left:
self.location.x -= 1
case .Right:
self.location.x += 1
}
*/
/*
switch direction {
case .Up:
return location.y += 1
case .Down:
return location.y -= 1
case .Right:
return location.x += 1
default:
return location.x -= 1
}
*/
3 Answers
Carmen Ibarcena
iOS Development Techdegree Student 8,296 Pointsclass 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) {
switch(direction) {
case Direction.up: location.y += 1
case Direction.down: location.y -= 1
case Direction.left: location.x -= 1
case Direction.right: location.x += 1
}
}
}
In this one I use a switch statement with each case
Mackenzy Douyon
iOS Development Techdegree Student 2,913 Pointsperfect, thanks.
Beatty Jamieson
3,660 PointsThank you. This was hanging me up too. Xcode wasn't rejecting my code, but treehouse kept giving me the error "make sure you are increasing y coordinate by 1", but didn't mention any other coordinates, which didn't make sense to me why it would only reject the one point if they all were written the same way.
switch direction {
case .left: Point(x: -1, y: 0)
case .right: Point(x: 1, y: 0)
case .up: Point(x: 0, y: 1)
case .down: Point(x: 0, y: -1)
}