How to properly declare Array type when initializing struct in Swift

Question

I'm trying to initialize a struct so I can parse from a JSON file in Swift. I have the following written:

struct StopDescription: Decodable {
    let stopId: String
    let translocStopId: String
    let stopName: String
    let stopDesc: String
    let stopLat: String
    let stopLon: String
    let directionId: String
    let times: [String]
}

In order to parse from this JSON code:

{
    stop_id: "M1",
    transloc_stop_id: "4160714",
    stop_name: "blank",
    stop_desc: "blank",
    stop_lat: "142",
    stop_lon: "-171",
    direction_id: "1",
    times: [
        "7:00 AM",
        "7:30 AM",
        "8:00 AM",
        "8:30 AM",
        "8:45 AM",
        "9:00 AM",
        "9:30 AM",
        "10:00 AM",
        "10:30 AM",
        "11:00 AM",
        "11:30 AM"
    ]
}

I'm not entirely sure if my Array declaration for the times variable is correct. Could someone please point me in the right direction?

It's a lot easier if you paste the code as formatted text into your question. Following the links for images isn't helpful. — Guy Kogus
– Guy Kogus, Commented May 24, 2018 at 15:14
Technically, your JSON is not JSON. You have to double quote the keys as well as the string values. If your JSON parser is bailing, that's probably the problem. — JeremyP
– JeremyP, Commented May 24, 2018 at 15:22

picciano · Accepted Answer · 2018-05-24 18:44:25Z

1

Yes, it is correct. Be sure to either add a CodingKeys enum or more preferably use the .convertFromSnakeCase as the keyDecodingStrategy when you parse the JSON.

struct StopDescription: Codable {
    let stopId, translocStopId, stopName, stopDesc: String
    let stopLat, stopLon, directionId: String
    let times: [String]
}

let let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase

let stopDescription = try? decoder.decode(StopDescription.self, from: jsonData)

edited May 24, 2018 at 18:44

answered May 24, 2018 at 15:24

picciano

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