/*
* Defines one-to-many dependencies between objects so that the state one changes, all dependent objects are notified.
* Contains two main actors, Subject which notifies change and Observer that receives and acts on updates
* Loose coupling is a benefit. However, Subject may send updates that don't matter to Observer.
*/
static void Main(string[] args)
{
var stockGrabber = new StockGrabber();
var observer1 = new Observer1();
var observer2 = new Observer2();
stockGrabber.Register(observer1);
stockGrabber.Register(observer2);
stockGrabber.SetPrice(100.00);
Console.ReadLine();
}
static void Main(string[] args)
{
Subject mySubject = new Subject();
IObserver myObserver1 = new Observer1();
IObserver myObserver2 = new Observer2();
// register observers
mySubject.Register(myObserver1);
mySubject.Register(myObserver2);
mySubject.Notify("message 1");
mySubject.Notify("message 2");
}
static void Main(string[] args)
{
Subject s1 = new Subject();
IObserver o1 = new Observer1();
IObserver o2 = new Observer2();
s1.register(o1);
s1.register(o2);
s1.Flag = 5;
s1.Flag = 25;
s1.unregister(o1);
s1.Flag = 50;
/*List<string> lista1 = new List<string>() { "1", "2", "3", "4" };
* List<string> lista2 = new List<string>() { "1", "2", "3", "6" };
* List<string> except = lista1.exceptAll(lista2);
*
* except.ForEach(Console.WriteLine);
*/
Console.ReadLine();
}
