import UIKit var data = """ { "A": "A", "B": "B", "C": "C", } """ class A : Codable { var A:String = "A" enum CodingKeys: String, CodingKey { case A = "A" } func encode(to encoder: Encoder) throws { var container = encoder.container(keyedB…

import UIKit enum Country: Int, Codable { case japan = 0 case usa case france } struct Member: Codable { let id: Int let country: Country } let json = """ { "id": 1, "country": 0 } """ let decoded = try JSONDecoder().decode(Member.self, fr…

import UIKit protocol Json : Codable { func json(key: String) -> String! var json:String! { get } } extension Json { func json(key: String) -> String! { let encoder = JSONEncoder() encoder.dateEncodingStrategy = .iso8601 encoder.outputForm…

import UIKit protocol Json : Codable { func json(key: String) -> String! var json:String! { get } } extension Json { func json(key: String) -> String! { let encoder = JSONEncoder() encoder.dateEncodingStrategy = .iso8601 encoder.outputForm…

struct User { func decorate(a: String) -> String { return "+++" + a + "+++" } func decorate(a: String, b: String) -> String { let a = self.decorate(a:a) let b = self.decorate(a:b) return a + ":" + b } } let user = User() let str = user.dec…

こんな感じでできるのか。いちいち、変数ごとにprintしてたよ。 var a1 = "Hello, playground" var a2 = "hoge" print(a1, a2)