Swift 4 JSON Decodable with multidimensional and multitype array

Question

{
\"values\":[
[1,1,7,\"Azuan Child\",\"Anak Azuan\",\"12345\",\"ACTIVE\",\"Morning\",7,12,\"2017-11-09 19:45:00\"],
[28,1,0,\"Azuan Child2\",\"Amran\",\"123456\",\"         


        

Answer 1

Solution

public struct UncertainValue: Decodable {
    public var tValue: T?
    public var uValue: U?

    public var value: Any? {
        return tValue ?? uValue
    }

    public init(from decoder: Decoder) throws {
        let container = try decoder.singleValueContainer()
        tValue = try? container.decode(T.self)
        uValue = try? container.decode(U.self)
        if tValue == nil && uValue == nil {
            //Type mismatch
            throw DecodingError.typeMismatch(type(of: self), DecodingError.Context(codingPath: [], debugDescription: "The value is not of type \(T.self) and not even \(U.self)"))
        }

    }
}

Example

{
"results": [{
        "name": "Gala",
        "age": 1,
        "type": "Pug"
    }, {
        "name": "Keira",
        "age": "7",
        "type": "Collie Rough"
    }]
}

Usage

struct Dog: Decodable, CustomStringConvertible {
    var name: String
    var age: UncertainValue
    var type: String

    var description: String {
        return "\(name) is a lovely \(type) of \(age.value!) years old"
    }
}