Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialIoana Marian
1,417 PointsI don't understand why these code doesn't pass the code challenge
Can someone helps me to pass this challenge?
class Point {
var x: Int
var y: Int
init(x: Int, y: Int) {
self.x = x
self.y = y
}
}
class Machine {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(_direction: String) {
print("Do nothing! I'm a machine!")
}
}
// Enter your code below
class Robot: Machine {
override func move(_direction: String) {
switch _direction {
case "Up": location.y += 1
case "Down": location.y -= 1
case "Right": location.x += 1
case "Left": location.x -= 1
default: break
}
}
}
1 Answer
David Papandrew
8,386 PointsHi Ioana,
Your code has two small typos that are preventing it from passing:
1) You need to escape the single quote in the print statement. Normally this shouldn't be a problem in Xcode, but for some reason it's an issue in the Treehouse editor. It's causing all the subsequent code to appear commented out.
2) The challenge uses the _ (underscore) in the move parameters for the external parameter name. You have removed the space between the external name and "direction". In your code instead of having "_ direction" you have "_direction". This appears in 2 places in your code. You need to fix that too.
Here's the corrected code. It passed when I ran it:
class Point {
var x: Int
var y: Int
init(x: Int, y: Int) {
self.x = x
self.y = y
}
}
class Machine {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(_ direction: String) {
print("Do nothing! I\'m a machine!")
}
}
// Enter your code below
class Robot: Machine {
override func move(_ direction: String) {
switch direction {
case "Up": location.y += 1
case "Down": location.y -= 1
case "Right": location.x += 1
case "Left": location.x -= 1
default: break
}
}
}
Ioana Marian
1,417 PointsIoana Marian
1,417 PointsThank you! ^.^ I didn't see that space there.