jdewind

@interface ApplicationDelegate<UIApplicationDelegate>
@end

@implementation ApplicationDelegate
- (RACSignal *)rac_registeredForRemoteNotifications {
    RACSignal *signal = objc_getAssociatedObject(self, _cmd);
    if (signal != nil) return signal;
    
    RACSignal *didRegisterForRemoteNotification = [[self rac_signalForSelector: @selector(application:didRegisterForRemoteNotificationsWithDeviceToken:) fromProtocol: @protocol(UIApplicationDelegate)] map: ^(RACTuple *tuple) {
        return tuple.second;

jdewind

@form.row(:subform_key).row(:a_row).on_tap |do|
end

jdewind

- (void) load {
  RACSignal *signal = [[api fetchPerson: personId] flattenMap: ^(id person) {
    return [[[api fetchFamilyMembers: person.id] map: ^(id familyMembers) {
      return [self buildViewModel: person familyMembers: familyMembers];     
    }] startWith: [self buildViewModel: person familyMembers: @[]];
  }];
}

jdewind

- (void) load {
  RACSignal* signal = [api fetchPerson: personId];
  [signal subscribeNext: ^(id person) {
      [view renderPerson: person];
  }];
  
  [signal subscribeError: ^(NSError *error) {
    [view renderError];
  }];
}

jdewind

- (instancetype)fetchPerson:(NSInteger)personId {
  [[self fetchAtEndPoint: [NSString stringWithFormat: @"/person/%d", personId], mapTo: [Person class]] flattenMap: ^(id person) {
    if(!person) {
      return [RACSignal error: nil];
    } else {
      return [RACSignal return: person];
    }
  }];
}

jdewind

class Car
  include RequireOptions
  def go(opts)
    gear, speed = require_options(opts, :speed, :gear)
    # ...
  end
end

jdewind

@implementation ConfirmationAlert
+ (void)show:(NSString *)message delegate:(id<UIAlertViewDelegate>)theDelegate {
  UIAlertView *alertView = [[[UIAlertView alloc] initWithTitle:@"Confirm" message:message delegate:theDelegate cancelButtonTitle:@"Cancel" otherButtonTitles:@"Confirm", nil] autorelease];
  [alertView show];
}
@end

jdewind

+ (void)showOneConfirmationAlert:(NSMutableDictionary *)externalState {
  [BlockConfirmationAlert show:@"Are you sure about this?"   
   confirmed:^(UIAlertView *alertView) {
     //...
     NSLog([externalState objectForKey:@"Key"]);
   } 
   canceled:^(UIAlertView *alertView) {
    //...
    NSLog([externalState objectForKey:@"DifferentKey"]);                      
  }];  

jdewind

@implementation MyObject
-(void)showOneConfirmationAlert:(NSMutableDictionary *)externalState {
  externalStateForOneConfirmationAlert = [externalState retain];
  oneConfirmationAlert = [[ConfirmationAlert show:@"Are you sure about this?" delegate:self] retain];
}

-(void)showAnotherConfirmationAlert:(NSMutableDictionary *)externalState {
  externalStateForAnotherConfirmationAlert = [externalState retain];
  oneConfirmationAlert = [[ConfirmationAlert show:@"Again, are you sure?" delegate:self] retain];
}

jdewind

typedef void (^ConfirmationBlock)(UIAlertView *);