A simple Event Emitter for swift (use EmitterKit for something more robust)

Event.swift

class Event <T:Any> {
    var handlers = Array<(T) -> Void>()
    
    func listen(handler: (T) -> Void) {
        handlers.append(handler)
    }
    
    func emit(object: T) {
        for handler in handlers {
            handler(object)
        }
    }
}

Example.swift

let didSomething = Event<String>()

didSomething.listen { str in
  println(str)
}

didSomething.emit("Did it!")
# => "Did it!"

let tupleEvent = Event<(String, Int)>()

tupleEvent.listen { (str, num) in
  doSomethingWith(str, num)
}

tupleEvent.emit("Example", 10)