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Start your free trialMackenzie Milroy
3,162 PointsI need help providing an implementation for the move method, someone please walk me through it and explain the steps
the instructions were : In the editor below you have two objects - classes named Point and Robot. The Robot stores its location as a point instance and contains a move function.
The task of this challenge is to complete the implementation for move. Move takes a parameter of type Direction which is an enumeration listing the possible movement directions.
When you tell the robot to move up (by specifying Direction.Up as the argument), the y coordinate should increase by 1. Similarly moving down means the y coordinate decreases by 1, moving right means the x coordinate increases by 1 and finally left means x decreases by 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 Direction.up: location.y =+ 1
case Direction.down: location.y -= 1
case Direction.left: location.x =+ 1
case Direction.right: location.x -=1
}
}
1 Answer
miikis
44,957 PointsHi Mackenzie,
You asked this 2 months ago and nobody answered? That's a shame. You've got the concept down; the only problem is a syntax error for the .up and .left cases of your move() method: the arithmetic operator comes before the equal-sign. Everything else looks fine, from a quick glance, so fixing the above should allow you to pass the Challenge.