externvoid

class Vehicle
{
    var wheels: Int? {
      get {
        return nil
      }
    }

    class func vehicleFactory(wheels:Int) -> Vehicle
    {

externvoid

⭕️forEach, for-inに応答できるオブジェクトを生成できるクラスを作る。
２つの文はループ枚にnext()を呼び出す。似たような関数anyGeneratorがあってその関数はGenerator型（closureを返すので、next()を呼び出すのと似ている）を返す。
1️⃣SequenceTypeに準拠させる
2️⃣generateメソッドを定義（SequenceTypeが要求）
3️⃣戻り値はGeneratorTypeに準拠させる
4️⃣戻り値のクラスにはnext()メソッドを用意する。

let sine = SineClass() //ここでgenerate()は呼ばれないfor or forEachで一回だけ呼ばれる
💠使い方１
for x in sine {

externvoid

import Foundation
// class clusterの例：2種のクラスのインスタンスを生成できるfactory
class MyColor {
//  var r: Int = 0, g: Int = 0, b: Int = 0
  class func createWithColor(n: Int) -> MyColor {
    var res: MyColor?
    switch n {
      case 0:
        res = RedMyColor()
      case 1:

externvoid

class KeyClass {
  var value:String
  init(_ value:String) {
    self.value = value
  }
}
extension KeyClass : Hashable {
  var hashValue: Int {
    return self.value.hashValue
  }

externvoid

import Foundation
enum Vehicle {  
    case Car(windows: Int, wheels: Int)
    case Ship(windows: Int, funnels: Int, anchors: Int)
    case Plane(windows: Int, wheels: Int, wings: Int, engines: Int)
}


var aPlane: Vehicle = .Plane(windows: 1, wheels: 9, wings: 8, engines: 4)
var voidPtr: UnsafePointer<Vehicle> = unsafeBitCast(&aPlane,                    

externvoid

import Foundation                                                               

func iterateEnum<T: Hashable>(_: T.Type) -> AnyGenerator<T> {
    var cast: (Int -> T)! // reference to clousure
//print(($0).dynamicType)
// what is $0 ?, Int, 0, 1, 2, 3, 4 for nil
    switch sizeof(T) {
    case 0: return anyGenerator(GeneratorOfOne(unsafeBitCast((), T.self)))
    case 1: cast = { unsafeBitCast(UInt8(truncatingBitPattern: $0), T.self) }
// print($0.dynamicType);print($0)

externvoid

enum Vehicle {  
    case Car(windows: Int, wheels: Int)
    case Ship(windows: Int, funnels: Int, anchors: Int)
    case Plane(windows: Int, wheels: Int, wings: Int, engines: Int)
}


var aPlane: Vehicle = .Plane(windows: 1, wheels: 9, wings: 8, engines: 4)

// Int8 takes 1 byte (8 bits) memory space.

externvoid

// case 1
//AppDelegate#application:didFinishLaunchingWithOptions
NSSetUncaughtExceptionHandler {e in
  print(">>>>> ExceptionHandler OK")
  let log = NSString(format:"%@, %@", e.name, e.reason!)
  NSUserDefaults.standardUserDefaults().setValue(log, forKey: "failLog")
}
// case 2
// Closureを渡さなくても、swift関数の関数名を渡しても良い。ただし、NSSetUncaughtExceptionHandlerと同じスコープ内に
// swift関数が無いとコンパイルエラー⁉️

externvoid

let vc = ParamViewController(nibName : "ParamViewController", bundle : nil)

externvoid

#!/bin/sh                                                                       
if [ $# -ne 1 ]; then
  echo "making 120, 180px icons at current directory from specified file."
  echo "usage: makeicon file, one args required";
  exit;
fi
BASEFILE=$1
echo $1
echo $BASEFILE
sips -Z 120 $BASEFILE --out [email protected]