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Here s the important section of the code that sets the fireBullet property to true: internal function attack():void { var fireTime:Number; if(!_turretArmed) { if(_turretModel.randomFire) { //Figure out the random fire time, which will be //a number between 200 and 1000 milliseconds. //(The _turretModel.fireFrequency propery has a //default value of 1000 milliseconds) fireTime = Math.round(Math.random() * turretModel.fireFrequency) + 200; } _timer = new Timer(fireTime); _timer.addEventListener (TimerEvent.TIMER, timerEventHandler); _timer.start(); } _turretArmed = true; } private function timerEventHandler(event:TimerEvent):void { //When the timer finishes, set the turret model's //fireBullets property to true. //This gives the GameController permission //to add bullets to the stage. The turret itself //doesn't fire any bullets. //The GameController does the actual job of adding, //managing and removing the bullets in the game. _turretModel.fireBullet = true; _turretArmed = false; _timer.removeEventListener(TimerEvent.TIMER, timerEventHandler); } The turret s model dispatches a CHANGE event when the value of fireBullet becomes true. public function set fireBullet(value:Boolean):void { _fireBullet = value; dispatchEvent(new Event(Event.CHANGE)); } The GameController is listening for this CHANGE event. It adds a bullet to the stage and positions it at the end point of the turret. The Game Controller is the only object that adds and removes objects in the game. qr code scanner for java phones Reading QRCode with Zxing in Java - Stack Overflow
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Oct 11, 2014 · This became easily popular because of the advent of mobile apps that can be used as a QR code scanner to read the information in QR codes. Software developers spend a lot of time considering the design and modeling of objects, and in a lot of scenarios, it is common to instantiate these objects directly. Although this is perhaps the easiest method to create an object, it is not always the best way. In the industry of technology and software development, change is a common occurrence. Although this can lead to exciting times, it can also create havoc when you need to update existing software applications. One way to mitigate the challenges of modifying an existing application is to abstract the different components used within an application. The Factory pattern, a creational pattern, is used to create concrete objects through an abstract object. Another way to look at it is that the client will use the factory to retrieve a final product. You can find the Factory pattern used extensively within the .NET Framework, such as the CreateDomain method of the System.AppDomain class and the CreateInstance method of the System.Array class. Listing 3-1 shows an example of the Factory pattern. Listing 3-1. Factory Pattern Example //interface that all concrete classes must implement public interface IDemo { string DemoType { get; } } //implementation of IDemo interface public class AlphaDemo :IDemo { private string m_Type; public AlphaDemo() { m_Type = "Alpha"; } //should return Alpha public string DemoType { get { java qr code reader example Simple steps to use instascan.js and build functionality similar to ...
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