Swift - Using Decodable to decode JSON array of just strings - json

Question

I have a sample JSON where its just an array of strings and has no keys and would like to use the Decodable protocol to consume the JSON and create a simple model out of it.
The json looks like this:
{ "names": [ "Bob", "Alice", "Sarah"] }
Just a collection of strings in an simple array.
What I'm unsure about is how do I use the new Swift Decodable protocol to read this into a model without a key.
Most of the examples I've seen assume the JSON has a key.
IE:
// code from: Medium article: https://medium.com/#nimjea/json-parsing-in-swift-2498099b78f
struct User: Codable{
var userId: Int
var id: Int
var title: String
var completed: Bool
}
do {
//here dataResponse received from a network request
let decoder = JSONDecoder()
let model = try decoder.decode([User].self, from:
dataResponse) //Decode JSON Response Data
print(model)
} catch let parsingError {
print("Error", parsingError)
}
This above example assumes that the json is a key-value; how can I use the decodable protocol to de-code the JSON without keys?
With thanks

Answer 1

The corresponding struct of this JSON is
struct User: Decodable {
let names: [String]
}
and decode
let model = try decoder.decode(User.self, from: dataResponse)
and get the names with
let names = model.names
or traditionally without the overhead of JSONDecoder
let model = try JSONSerialization.jsonObject(with: dataResponse) as? [String:[String]]

Answer 2

For this simple structure of json , i guess it's better not to create any structs and use
let model = try decoder.decode([String:[String]].self, from: dataResponse)
print(model["names"])
the json fiting for your model is
{
"names": [{
"userId": 2,
"id": 23,
"title": "gdgg",
"completed": true
}]
}
struct Root: Codable {
let names: [User]
}
struct User: Codable {
let userId, id: Int
let title: String
let completed: Bool
}