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protocol Button {
    func paint()
}

protocol GUIFactory {
    func createButton() -> Button
}

class WinButton: Button {
    func paint() {

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  func initializePlayerNotification() {
    myMusicPlayer!.beginGeneratingPlaybackNotifications()
    
    /* Get notified when the state of the playback changes */
    NSNotificationCenter.defaultCenter().addObserver(self,
      selector: "musicPlayerStateChanged:",
      name: MPMusicPlayerControllerPlaybackStateDidChangeNotification,
      object: nil)
    

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func readFile(fileName: String, fileType: String) -> String{
    var fileRoot = NSBundle.mainBundle().pathForResource(fileName, ofType: fileType)
    var contents = NSString.stringWithContentsOfFile(fileRoot!, encoding: NSUTF8StringEncoding, error: nil)
    return contents
}

// example: read file.txt
var contents = readFile("file", fileType: "txt")

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import Foundation
import UIKit

typealias Position = CGPoint
typealias Distance = CGFloat

typealias Region = Position -> Bool

func inRange1(target: Position, range: Distance) -> Bool {
  return sqrt(target.x * target.x + target.y * target.y) <= range

minsOne

짝수이면 2로 나누고, 홀수이면 3을 곱하고 1을 더하여 최종 값이 1이 될떄까지 몇번이나 도는지 측정
두 개의 값을 입력받아 길이가 더 긴 숫자를 출력함.

import Foundation

var a = 3
var b = 5

func calcValue(var value: Int) -> Int {
  var count = 0

minsOne

import Foundation



var checkOpenCloseBracket:((String, String) -> Bool)!
checkOpenCloseBracket = { (openBracket, closeBracket) in
  var result: Bool
  switch (openBracket, closeBracket) {
  case _ where openBracket == "{" && closeBracket == "}":
    result = true

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override func shouldAutorotate() -> Bool {
    return isRotate
  }
  
  override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
    if UIDevice.currentDevice().orientation.isLandscape.boolValue {
      println("Now Device Orientation is Landscape")
    } else {
      println("Now Device Orientation is Portrait")
    }

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import UIKit
import XCPlayground
 
let containerView = UIView(frame: CGRect(x: 0.0, y: 0.0, width: 375.0, height: 667.0))
XCPShowView("Container View", containerView)
 
let circle = UIView(frame: CGRect(x: 0.0, y: 0.0, width: 50.0, height: 50.0))
circle.center = containerView.center
circle.layer.cornerRadius = 25.0
 

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//The setup code (in viewDidLoad in your view controller)
UITapGestureRecognizer *singleFingerTap = 
  [[UITapGestureRecognizer alloc] initWithTarget:self 
                                          action:@selector(handleSingleTap:)];
[self.view addGestureRecognizer:singleFingerTap];
[singleFingerTap release];

//The event handling method
- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer {
  CGPoint location = [recognizer locationInView:[recognizer.view superview]];

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open -a /Applications/SourceTree.app .