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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enums and Objects

Stuck On It

I'm on the preview and i don't understand what is still the problem.

test.swift
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
           func enum_move(direction: Direction){ 
        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
        }
    }
}

1 Answer

David Papandrew
David Papandrew
8,386 Points

You are really close, I see two problems: 1) You removed the underscore for the external parameter name in the move func (just add it back)

2) You don't need the func enum_move line (remove it)

Here's the code (it passed when I tested it):

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: self.location.y += 1
        case .down: self.location.y -= 1
        case .left: self.location.x -= 1
        case .right: self.location.x += 1
        }
    }
}