a little foggy on passing variables to the Constructor from a Singleton instance. Could someone enlighten?
From timeline:
Code:
var c:Calculator = Calculator.getInstance(5,20,30);
[Code]...
I am not able to understand, why a static class cannot replace a Singleton design pattern .
Cannot a static class, can be used to ensure, the class is never/once only, instantiated. Because that is the facility "static" key words provide , however it doesnot allow instantiation, but that is much similar to the limitation of instantiation once only.
I can't understand why should I even use the Singleton pattern in ActionScript 3. Can anyone explain me this? Maybe I just don't understand the purpose of it. I mean how it differs from other patterns? How it works? I checked the PureMVC source and it's full of Singletons. Why are they using them in the View, Module, Controller?
View 2 Repliespackage public class Singleton private static var _instance:Singleton=null;
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I'm trying to call AMFPHP two times on a single ActionScript method and what happen is that only the first call succeed. The second one doesn't return an error, doesn't alertsanything, it is more likely that it doesn't even happens and I'm not sure why.Here is an example:
public function editSomething():void{
if(dgChild.selectedIndex == -1){
Alert.show("You need to select a register in order to edit it.");
[code].....
I'm looking to get some good books on design patterns and I'm wondering what particular pattern you'd recommend for a Realtime Strategy Game (like Starcraft), MVC?. I'd like to make a basic RTS in Flash at some point and I want to start studying the best pattern for this.
View 3 RepliesJust curious. TweenLite/TweenMax is a very common animation library, and I was wondering how someone would classify the design pattern used in TweenLite.For those of you unfamiliar, here's some example code from their website:[code]
View 1 RepliesCan anyone show an example of the object pool design pattern, as written with Actionscript 3.0?
View 1 RepliesI am just looking design patterns used in Flex. Any value object design pattern and how is it implemented in Flex.
View 3 RepliesI haven't found the best process is integrating SWFAddress. I've used it on just about every project since it came out, but I rarely have something reusable, and integrating SWFAddress is one of the more time/thought intensive tasks in the dev of a project.
View 5 RepliesI'm just beginning to wrap my head around design patterns. I'm in the process of rebuilding a slideshow using MVC and it's coming along nicely. I'm considering using a design pattern for the whole site and am wondering if there are certain patterns that people usually apply to sites.
View 4 RepliesI'm updating a photo gallery site I did a while back to be full browser and with classesI produced this demo to work out the full browser elementsI did this with a Document Class and everything seems to be working as expected.For the updated version of the site I'm using a Model View Controller design pattern and I'm trying in implement the full browser in the View ClassTypeError: Error #1009 : Cannot access a property or method of a null object reference.I would have excepted more form this forum but I can't post any code here or even paste the text - very poor.
View 1 RepliesI have an application that takes the user through a set of steps, configuring a product, say about 10+ screens. With options to go back, skip to a certain point etc. I need to fade between these steps, and also have language switches available at any point.
I was thinking of using an MVC style pattern, having a master view that accepts a 'next view' and fades it in, removing the old.
It feels bloated to have 10+ separate view classes, using similar components for this task, so was wondering what other approaches there are that I should look into? or one that is suited for this kind of application
I'm still studying OOP designs, so what's the best way to achieve an inventory for a simple flash game? It seems that more than one design pattern could deliver some kind of an inventory but I would lose the flexibility if I try to adapt it somehow without a good knowledge about the subject. For money to buy what is available in an inventory I thought of Singleton. If there's enough cash earned while playing the game, then one can buy new skills. Maybe decorator pattern could list many thumbnails as buttons, and clicking on it applies new features and skills to the character.
View 1 RepliesIn this cookbook someone advocates to build own Observer Design Pattern: [URL]
Is it really faster as for performance ?
There are many times that I've needed to execute some code after a number of events have fired, and I've come up with counters and such but I feel there must be a better way.For example, say five files need to be loaded, after which a UI component will become active.If I set up a counter that increments each time a file is requested, then decrements each time one has loaded, I run the risk that the first two or three files may somehow get completely loaded before my code gets around to requesting the fourth and fifth, which would mean that my counter would be at zero when I still have two files to load, thus allowing the UI component to be prematurely activated.
There are some cases where you could know the number that need to be loaded before the requests go out, but it's possible that the first file contains the paths (and therefore the number of) files.And this file-loading scenario is only an example of the pattern I'm trying to explain.)
i'm trying to search a string for a particular pattern, and replace it with elements from within the pattern... for example..here's the given string...if you want to learn how to use regexp, {url===http://somesite.com, text===click here}.
the pattern...
{url===http://somesite.com, text===replacement text}
and the intended result...
if you want to learn how to use regexp, click here.
of course, i'll extract the url and do something else with it... i'm just wondering what the regexp is for that pattern, and how i can extract things from the results returned.
I am looking at the singleton design pattern and trying to really understand what is going on here. But I have some questions that it would seem my logic and/or the way I am reading this is wrong. Take the following code for example
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In the Singleton design pattern you can throw a runtime error if the instance has already been created. But this doesn't work when your singleton class extends another class and has to call super() in its constructor, because (for some reason) you cannot call super() if you've already called throw(), or in fact, you cannot compile code that has a potential call to throw() (for example, in an IF statement) that comes BEFORE that call to super().
View 4 RepliesWhat is the possibility of a singleton reference to be lost. Well I created a swf singletonpara a store containing some sound features of the software that I created and it's one time or another error saying that the reference is null
View 5 RepliesI have a doubt,.... How would you create a Singleton class in Flex...
Is there any convention like the class name should eb Singleton or it should extend any other class.
How many Singleton class can a project have?
Can anyone say the real time usage of a Singleton class?
I am planning to keep my components label texts in a Singleton class... Is it a good approach.
I have a few classes in my project which aren't display objects, but they need to know about the stage of my project (stage.stageWidth, stage.stageHeight). Is there a simple way to pass this information along to my classes without using a Singleton or passing these items in as parameters into the constructor??
View 3 RepliesIf multiple instances of a singleton are trying to update the same property simultaneously, will there be any conflicts? How does AS3 handle the order?Flash is currently single-threaded.. will the write order be an issue when it becomes multi-threaded?
View 3 RepliesThe use I have for it is for storing user credentials, and calling a transfer object that functions as a sort of "cache" for the current session in all of the flex modules.
Thinking about objects that have to be present in every module. Is there any alternative to a singleton instance for this?
I'm storing my model data in a Singleton called ModelLocator. This is pretty common...
Can I look at this data in the debugger?
[Edited - Title changed]
How can I define my own global function which will be accessible throughout the whole package or better, program? Alternatively, how can I define a singleton object? Should I use static?
View 3 RepliesI'm trying to do singleton movieclip from library, but can't get it work, how should I proceed?[code]1136: Incorrect number of arguments.Expected 1.And it is refering to the MyMovieClip.as file, to the line where I have "_myMovie = new MyMovie();".
View 6 RepliesI'm trying to load swf from 127.0.0.1 into my main.swf with Flash Pro
Both swfs have Singlenton class
How to make it that loaded swf use Singlenton of main.swf ?
I did
ActionScript Code:
var lc:LoaderContext = new LoaderContext();
lc.applicationDomain = ApplicationDomain.currentDomain;
myLoader.load( new URLRequest("http/127.0.0.1/loaded.swf"),lc);
anyway I have 2 different Singlenton classes one comes with loaded.swf another in main.swf and variables not shared
is any way I can merge this values?
I am trying to create a singleton class, that extends Sprite. It seems to work correctly, but it doesn't actually update the screen.If I access my instance and change the properties (x,y,alpha,etc) they will all update, but the display doesn't change.eg:My clip starts at x=0.MyClass.getInstance().x = 99;trace(MyClass.getInstance.x); //traces 99, but it still appears at 0 on the screen.
View 7 RepliesSo I have this class "G" that I use for global vars, and that kind stuff.
Now I want to dispatch an event from that class and no matter what I do the compiler throws the same error: "Call to a possibly undefined method dispatchEvent."
I have already tried extending the EventDispatcher class...
Code:
package {
import flash.events.Event;
import flash.net.URLLoader;
import flash.net.URLRequest;
[Code]....