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iOS Swift Enums and Structs Enums Enum Members and Raw Values

Patrick Glenn
Patrick Glenn
1,363 Points
Posted by Patrick Glenn
Patrick Glenn
1,363 Points

What does it mean by "The variable 'turtleSpeed' was expected to be of type 'Int, but is wasn't."?

Im on step 2 of the Challenge.

enum.swift 
enum Speed: Int {
    case Slow = 10
    case Medium = 50
    case Fast = 100
}
var turtleSpeed = Speed(rawValue: 10)

2 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

it means that it expected an Int, but got something else. 

Speed(rawValue: 10)

is not the correct way to access the raw value of an enumeration member which is why it did not return an Int like the challenge was expecting.

according to the Swift eBook:

Access the raw value of an enumeration member with its rawValue property:

enum Planet: Int {
    case Mercury = 1, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
}

let earthsOrder = Planet.Earth.rawValue
// earthsOrder is 3

using the example above, we can access the rawValue of the Slow speed like so:

enum Speed: Int {
    case Slow = 10
    case Medium = 50
    case Fast = 100
}
var turtleSpeed = Speed.Slow.rawValue
Patrick Glenn
Patrick Glenn
1,363 Points
Patrick Glenn
Patrick Glenn
1,363 Points

Thank you very much!

Sako Kassabian
Sako Kassabian
13,796 Points
Sako Kassabian
Sako Kassabian
13,796 Points

I was stuck on the same one and was trying the same answer as OP. The corresponding video is very confusing on this point.

Alamuddin Bakhit
Alamuddin Bakhit
1,355 Points
Alamuddin Bakhit
Alamuddin Bakhit
1,355 Points

This was very confusing for me either, I hope to see a change in the video or the test.