Codable to handle optional properties from JSON

Codable+OptionalFields.swift

import UIKit

struct Employee: Codable {
    let name: String
    let phoneNumber: String?
}

let jsonDataWithPhoneNumber: Data = """
{
    "name": "Eric",
    "phoneNumber": "+1 12312312"
}
""".data(using: .utf8)!

let jsonDataWithoutPhoneNumber: Data = """
{
    "name": "Ronaldo"
}
""".data(using: .utf8)!

let eric = try! JSONDecoder().decode(Employee.self, from: jsonDataWithPhoneNumber)
let ronaldo = try! JSONDecoder().decode(Employee.self, from: jsonDataWithoutPhoneNumber)
let notAvailable = "Not Available"

print("Eric phone number = \(eric.phoneNumber ?? notAvailable)")
print("Ronaldo phone number = \(ronaldo.phoneNumber ?? notAvailable)")