SatoTakeshiX

func someFunction<T>(_ argument1: T, _ argument2: T) {}

someFunction(1, 2) // OK
someFunction("abc", "def") // OK
// someFunction(1, "abc") // 型引数が一致しないためコンパイルエラー

SatoTakeshiX

class Person {
    let name : String
    init(name: String) {
        self.name = name
    }
}

class User : Person {
    let id : Int
     init(id : Int) {

SatoTakeshiX

class SuperClass {
    var value = 1
}

class SubClass: SuperClass {
    fileprivate var _subValue: Int! = nil {//サンプルとしてfileprivateでしているけど本当はprivateのほうがいいかも
        willSet {
            guard newValue != nil else {
                fatalError("nilだよ")
            }

SatoTakeshiX

class SomeClass {
    let id: Int

    init(id: Int) {
        self.id = id
    }
    deinit {
        print("remove")
    }
}

SatoTakeshiX

enum SomeError: Error {
    case error1
    case error2(reason: String)
}

do {
    throw SomeError.error2(reason: "何かがおかしいようです")
} catch SomeError.error1 {
    print("error1")
} catch SomeError.error2(let reason) {

SatoTakeshiX

Result<User, ~~Error>
let r1 = findUser(byID: 123)
let r2 = r1.flatMap{ localRart (fromEmail: $0.email)
//r2はResult<String, ~~Error)になる

SatoTakeshiX

class Rational (val numerator: Int, val denominator : Int){
    override fun toString(): String = "${numerator}/${denominator}"
}

SatoTakeshiX

/**
 * Created by satoutakeshi on 2017/07/17.
 */
fun main(args : Array<String>) {
    val result = succ(31)
    println(result)
    println(square(5))
    println(hello("sato"))
    println(max(2, 4))
    println(sum(arrayOf(1,2,3)))

SatoTakeshiX

let config = try Config()
try config.setup()

let drop = try Droplet(config)
drop.get("qiitaSchema") { req in

    guard let resultJson = try drop.client.get("http://qiita.com/api/v2/schema").json else {
        throw Abort.serverError
    }
    return resultJson

SatoTakeshiX

fun foo() {
    ints.forEach {
        if (it == 0) return@forEach
        print(it)
    }
}