This is very interesting to me. I don't know how that all works in a real-case scenario yet, but I will. ;) When I get into design patterns I think I may revisit this post. Thanks Kevin.
Best, Karl DeSaulniers Design Drumm http://designdrumm.com On May 21, 2013, at 5:51 PM, Kevin Newman wrote: > Why? The answer has to do with Adobe's adherence to the ECMAScript working > standard that they were basing AS3 on. At the time (before the ECMAScript 4 > process fell apart), the body determined that private constructors were not > needed, so adobe built this restriction into AS3. > > Private constructors aren't useless, particularly for single pattern. With a > private constructor, you can instantiate the class from within itself, assign > it to a private class (static) property, and then expose the single instance > through a public class (static) getter function. You'd be protected from > every other way to instantiate the class. There are ways to do singleton > without it, they are just more of a pain. Like taking an instance of a key > class in the constructor, where the Key class is defined in the local class > file scope chain. Since nothing else will have access to that Key class > except your singleton class, you can use that as a nice locking mechanism. > > I can't think of any use for private class off the top of my head, but that > doesn't mean there isn't one. > > Kevin N. > > > On 5/21/13 2:39 AM, Cor wrote: >> Karl, >> >> One: why doesn't ActionScript 3 allow private classes? >> A: They are useless because they couldn't be used, I guess. >> You can use a Class within a public class which then would be private to >> that class it self. >> >> Two: why is writing "public class" a best practice if "private class" does >> not exist? >> Look a the variations with static etc. >> >> HTH >> Cor >> >> >> >> >> _______________________________________________ >> Flashcoders mailing list >> Flashcoders@chattyfig.figleaf.com >> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > _______________________________________________ > Flashcoders mailing list > Flashcoders@chattyfig.figleaf.com > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders _______________________________________________ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
