How to access switch results of a case?

Chéyo Published at Dev

Chéyo

How does one access the switch statement result of the example apple swift book code?

I guess I could make function that just returns the value of the case statement but I am trying to understand this code.

enum ServerResponse {
    case Result(String, String)
    case Error(String)
}

let success = ServerResponse.Result("6:00 am", "8:09 pm")
let failure = ServerResponse.Error("Out of cheese.")

switch success {
case let .Result(sunrise, sunset):
    let serverResponse = "Sunrise is at \(sunrise) and sunset is at \(sunset)."
case let .Error(error):
    let serverResponse = "Failure...  \(error)"
}

diazant

The example is so contrived that it's not at all helpful. Consider this

enum ServerResponse {
    case Result(String, String)
    case Error(String)
}

for i in 1...100 {
    let mySuccess: ServerResponse = {
        let zeroOrOne = rand() % 2
        if zeroOrOne == 0 {
            return ServerResponse.Result("7:00 am", "8.09 pm")
        } else {
            return ServerResponse.Error("Out of cheese.")
        }
    }()

    var serverResponse: String
    switch mySuccess {
    case let .Result(sunrise, sunset):
        serverResponse = "Sunrise is at \(sunrise) and sunset as \(sunset)"
    case let .Error(error):
        serverResponse = "Failure... \(error)"
    }

    println(serverResponse)
}

The gist is that the 'success' variable in the example should really be an assignment as a result of some function / subsystem call. I wrapped it in a loop for println() clarity

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