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iOS

Posted by Farhan Hussain
Farhan Hussain
13,928 Points

Works on Xcode but not here. Why?

The question is: Let's get in some practice creating enums with raw values. Declare an enum named Compass with a raw value of type Int.

Give the enum 4 members: North, South, East and West and assign them default raw values.

Assign the enum value South of enum Compass to a constant named direction, by using a raw value with Compass' initializer method.

My code:

enum Compass: Int {
    case North = 1
    case South
    case East
    case West
}

if let direction = Compass(rawValue: 2) {

    print(direction)
}

my code works in Xcode but not on treehouse. Can someone explain what I'm doing wrong. Thanks.

Farhan Hussain
Farhan Hussain
13,928 Points

I saw in other posts that using the below code works:

let direction = Compass(rawValue: 2)

Can someone explain the difference between my code and the answer? Thanks.

Andrew Taylor
Andrew Taylor
11,500 Points

Can you link the question please?

Farhan Hussain
Farhan Hussain
13,928 Points

The question is here: https://teamtreehouse.com/library/swift-20-enumerations-and-optionals/objects-and-optionals/enums-with-raw-values

2 Answers

tobiaskrause
tobiaskrause
9,160 Points
tobiaskrause
tobiaskrause
9,160 Points

"Assign the enum value South of enum Compass to a constant named direction, by using a raw value with Compass' initializer method."

There was no instruction to do a if-statement...just an assignment of the second value in your enum. Just do the stuff they want from you or sometimes challenges wont work

Andrew Taylor
Andrew Taylor
11,500 Points
Andrew Taylor
Andrew Taylor
11,500 Points

Yer all you should be doing is this,

enum Compass: Int {

  case North = 1
  case South
  case East
  case West
}
let direction = Compass(rawValue: 2)

Don't just copy the code, understand it though. So you are setting up an enum called Compass of type int. Adding the cases (only need to do the first one, swift is smart enough to number the rest).

Then you assign a constant (let) named direction to the rawValue of 2 (south) of Compass.

Mackenzy Douyon
.a{fill-rule:evenodd;}techdegree
Mackenzy Douyon
iOS Development Techdegree Student 2,913 Points

does not pass

Raphael Reiter
Raphael Reiter
6,820 Points

he specifically says: Assign the enum value Compass.south to a constant named direction, by using a raw value with Compass' initializer method.