yarneo

NSDictionary *dogBreeds = @{@”Bugsy” : @”Pug”,
                            @”Marcelle” : @”Chow Chow”,
                            @”Daisy” : @”Labrador”;
NSString *name = @"Chloe's breed is: ";
NSString *breed = dogBreeds[@"Chloe"];
/* Crash at runtime because breed is null */
NSString *message = [name stringByAppendingString:breed];

yarneo

protocol Summable { func +(lhs: Self, rhs: Self) -> Self }
extension Int: Summable {}
extension Double: Summable {}
extension String: Summable {}

func sum<T: Summable>(lhs:T, _ rhs:T) -> T {
    return lhs + rhs
}

sum("Hello ", "World") // "Hello World"

yarneo

func calculateCircle(radius : Double) -> 
(area : Double, circumference : Double, diameter : Double) {
    return (M_PI * pow(radius, 2), 2 * M_PI * radius, 2 * radius)
}

yarneo

enum Person {
    case FullName(String)
    case personID(Int)
    init(personID: Int) {
        if personID == 123456789 {
            self = .FullName(“Barack Obama”)
        } else {
            self = .personID(personID)
        }
    }

yarneo

struct Dog {
    var name: String
    var type: String    
    init(name: String, type: String) {
        self.name = name
        self.type = type
    }
}

var aDog = Dog(name: "Bugsy", type: "Pug")

yarneo

func bouncerResponse(job: String, age: Int, bribe: Int) -> String? {       
    switch (job, age, bribe) {
        case (let j, _, _) where (j.rangeOfString(“model”) != nil) :
             return “come in, welcome, the VIP is that way :)”

        case (_, 0..<21, _): return “too young bro”

        case (“Owner of OMNIA”, 32, _): 
             return “sorry, we don’t let our competitors in”

yarneo

/**
 An MDCShapeGenerating for creating shaped rectangular CGPaths.

 By default MDCRectangleShapeGenerator creates rectangular CGPaths.
 Set the corner and edge treatments to shape parts of the generated path.
 */
@interface MDCRectangleShapeGenerator : NSObject <MDCShapeGenerating>

/**
 The corner treatments to apply to each corner.

yarneo

- (MDCPathGenerator *)pathGeneratorForCornerWithAngle:(CGFloat)angle
                                               andCut:(CGFloat)cut {
  MDCPathGenerator *path =
      [MDCPathGenerator pathGeneratorWithStartPoint:CGPointMake(0, cut)];
  [path addLineToPoint:CGPointMake(MDCSin(angle) * cut, MDCCos(angle) * cut)];
  return path;
}

yarneo

- (MDCPathGenerator *)pathGeneratorForCornerWithAngle:(CGFloat)angle 
                                            andRadius:(CGFloat)radius {
  MDCPathGenerator *path =
      [MDCPathGenerator pathGeneratorWithStartPoint:CGPointMake(0, radius)];
  [path addArcWithTangentPoint:CGPointZero
                       toPoint:CGPointMake(MDCSin(angle) * radius, MDCCos(angle) * radius)
                        radius:radius];
  return path;
}

yarneo

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
  if (self.layer.shapeGenerator) {
    if (CGPathContainsPoint(self.layer.shapeLayer.path, nil, point, true)) {
      return self;
    } else {
      return nil;
    }
  }
  return [super hitTest:point withEvent:event];
}