Codable {Apple Swift version 4.0 (swiftlang-900.0.45.6 clang-900.0.26)}

Codable.swift

extension Encodable {
    func encode(with encoder: JSONEncoder = JSONEncoder()) throws -> Data {
        return try encoder.encode(self)
    }
}

extension Decodable {
    static func decode(with decoder: JSONDecoder = JSONDecoder(), from data: Data) throws -> Self {
        return try decoder.decode(Self.self, from: data)
    }
}

Wow！It's beautiful and simple code! Please accept my kness!