zwetan wrote:
Have anyone got ideas how to implement Singleton pattern in AS3 best? Constructor in AS3 can only be public or internal, which is not private anyway. ..Well, internal should be enough to implement a Singleton Just have a public const in the package initialized with an internal class of the package Something like that myTest/MySingleton.as ----------------------------- package myTest { public const MySingleton:Singleton = new Singleton(); } ----------------------------- myTest/Singleton.as ----------------------------- Package myTest { //default to internal, can only be accessed inside the package class Singleton { //be sure to let the constructor internal function Singleton() { //... } //be sure to have your methods/properties/etc. public //so it can be accessed outside of the package public function someMethod():String { //... } } } ----------------------------- And after well import myTest.MySingleton; MySingleton.someMethod() etc. I don't see the need of a private constructors at all And furthermore private constructors imho would cause more problems than solutions What people oversee is that we are in ECMAScript, A Singleton in this context should just be an object That you can not copy and/or inherit in another prototype So a public read-only object. Here having an internal class inside a package prevent to instanciate this class outside of the package the public const force to have only one global access point to the instancied object So where is the problem ? Not having private constructors is not a bug, It's using a private constructor to implement singleton which is imho a bug/hack from AS2 times. http://www.mozilla.org/js/language/es4/core/definitions.html private - Makes the definition visible only in the enclosing class's private namespace so following the standard if you got a private constructor you just CAN NOT instanciate at all the class anywhere else than inside the class ! private constructors just does not make sens. zwetan
They do. With internal access modifier you're still able to create an instance of class directly.
-- Michael "Antares" Klishin, Email: [EMAIL PROTECTED] Web: www.novemberain.com Non progredi est regredi _______________________________________________ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
