Pass Int to enum and return a String

Question

I'm trying to accomplish a task which is passing an integer value to enum, and return a specific String for the passed in integrer.

I'm using enum because the integers are known and each of them has a meaning. I have done the following:

enum Genre: String {
    case 28 = "Action"
    case 12 = "Adventure"
    case 16 = "Animation"
    case 35 = "Comedy"
    case 80 = "Crime"
}

What I'm expecting: when passing one of the cases, I want to return the String association.

Please, if you have a question or need any further into, ask it in the comment.

Nope, any thoughts on what is the best practice to use it here? — Ennabah
– Ennabah, Commented Jun 2, 2017 at 8:48

Bilal · Accepted Answer · 2017-06-02 09:15:45Z

2

How about this

enum Genre: Int {
    case action = 28
    case adventure = 12
    case animation = 16
    case comedy = 35
    case crime = 80
}

And use it like this

// enum as string 
let enumName = "\(Genre.action)" // `action`

// enum as int value 
let enumValue = Genre.action.rawValue // 28

// enum from int
let action = Genre.init(rawValue: 28)

Hope it helps. Thanks.

answered Jun 2, 2017 at 9:15

Bilal

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Comments

D4ttatraya · Accepted Answer · 2017-06-02 09:50:57Z

2

We can not have Int as an enum case name.
Try this:

enum Genre: Int {
case action = 28, adventure = 12, animation = 16, comedy = 35, crime = 80

  func getString() -> String {
    switch self {
    case .action: return "Action"
    case .adventure: return "Adventure"
    case .animation: return "Animation"
    case .comedy: return "Comedy"
    case .crime: return "Crime"
    }
  }
}

let gener = Genre.action
print(gener.getString())//"Action"

And if you only know integer value, do this:

let gener1 = Genre(rawValue: 12)!
print(gener1.getString())//"Adventure"

edited Jun 2, 2017 at 9:50

answered Jun 2, 2017 at 9:39

D4ttatraya

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Comments

D4ttatraya · Accepted Answer · 2017-06-02 09:46:50Z

1

let Genre = [28:"action",
12: "adventure",
16: "animation",
35: "comedy",
80: "crime"]

Example use:
let retValue = Genre[28]//"action"

Here is playground demo:

edited Jun 2, 2017 at 9:46

D4ttatraya

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answered Jun 2, 2017 at 9:29

wanchen

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Comments

Mo Abdul-Hameed · Accepted Answer · 2017-06-02 11:01:45Z

1

I suggest creating a dictionary that achieves the mapping you need, and creating constants for your keys to use them.

You can start by creating a class called Constants and putting the following constants in it:

static let action = 28
static let adventure = 12
// ... The rest of your constants.

// Then create a dictionary that contains the values:
static let genre = [action : "Action", adventure : "Adventure"] // And so on for the rest of your keys.

Then you could access any value you need using that dictionary like so:

let actionString = Constants.genre[Constants.action]

Hope this helps.

edited Jun 2, 2017 at 11:01

answered Jun 2, 2017 at 8:56

Mo Abdul-Hameed

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