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Start your free trialZac Duvall
3,662 PointsNeed some help with this 'switch' Note.
2 questions.
how exactly would I use a String that says "Up" or "Down" to modify the 'location'
the Note of using a switch statement 'break', this bit doesn't make too much sense to me
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!")
}
}
class Robot: Machine {
override func move(_ direction: String) {
print("Do nothing! I'm a machine!")
}
}
1 Answer
Jeff McDivitt
23,970 Points- how exactly would I use a String that says "Up" or "Down" to modify the 'location'
You would use a switch statement with the String as a case
- the Note of using a switch statement 'break', this bit doesn't make too much sense to me
You need to use break to make the switch statement exhaustive
class Robot: Machine {
override func move(_ direction: String) {
switch direction {
case "Up":
location.y += 1
case "Down":
location.y -= 1
case "Left":
location.x -= 1
case "Right":
location.x += 1
default:
break
}
}
}