Comments on: The quest for the elusive “N-gleton” http://dispatchevent.org/mims/the-quest-for-the-elusive-n-gleton/ Collective thoughts on the Flash Platform, iOS, Unity, and any other technology we use. Tue, 24 Jan 2012 12:18:11 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Jon Toland http://dispatchevent.org/mims/the-quest-for-the-elusive-n-gleton/comment-page-1/#comment-140092 Jon Toland Sat, 28 Feb 2009 02:26:12 +0000 http://dispatchevent.org/?p=638#comment-140092 Thx for the 411 I like the way you implemented that suspect it'll come in handy next time. Thx for the 411 I like the way you implemented that suspect it’ll come in handy next time.

]]> By: Mims H Wright http://dispatchevent.org/mims/the-quest-for-the-elusive-n-gleton/comment-page-1/#comment-140044 Mims H Wright Fri, 27 Feb 2009 18:21:09 +0000 http://dispatchevent.org/?p=638#comment-140044 Hey Jon, It does return the same instance if you use two strings with the same value (because of the way strings are evaluated in AS3) but it does not return the same instance if you use two different objects even if the objects contain the same data. So: getInstance("foo") == getInstance("foo") but getInstance({name:"foo"}) != getInstance({name:"foo"}) Hey Jon,

It does return the same instance if you use two strings with the same value (because of the way strings are evaluated in AS3) but it does not return the same instance if you use two different objects even if the objects contain the same data. So:
getInstance(“foo”) == getInstance(“foo”)
but
getInstance({name:”foo”}) != getInstance({name:”foo”})

]]> By: Jon Toland http://dispatchevent.org/mims/the-quest-for-the-elusive-n-gleton/comment-page-1/#comment-139846 Jon Toland Thu, 26 Feb 2009 05:00:39 +0000 http://dispatchevent.org/?p=638#comment-139846 Yeah multiton pattern. For a use case and alternate implementation check out <a href="http://trac.puremvc.org/PureMVC_AS3_MultiCore" rel="nofollow">Puremvc Multicore</a> :) I used this pattern this week to ensure only one JavaScript HTML editor was spawned by a given custom Flex TextArea instance. Thus multiple pop-ups could be spawned but no more than a 1 to 1 ratio with associated components. It is interesting that you used a Dictionary in lieu of a plain old Object. Does it return the same instance if you try to use two different variables as keys that contain the same String? That'd be a zinger for flexibility if so. Yeah multiton pattern. For a use case and alternate implementation check out Puremvc Multicore :)

I used this pattern this week to ensure only one JavaScript HTML editor was spawned by a given custom Flex TextArea instance. Thus multiple pop-ups could be spawned but no more than a 1 to 1 ratio with associated components.

It is interesting that you used a Dictionary in lieu of a plain old Object. Does it return the same instance if you try to use two different variables as keys that contain the same String? That’d be a zinger for flexibility if so.

]]> By: Paolo Iulita http://dispatchevent.org/mims/the-quest-for-the-elusive-n-gleton/comment-page-1/#comment-139751 Paolo Iulita Wed, 25 Feb 2009 08:55:20 +0000 http://dispatchevent.org/?p=638#comment-139751 uhm.... your approach remember me the Factory pattern. but, i can not imagine when it may be useful.. is there any case study for it? ciao! uhm…. your approach remember me the Factory pattern.
but, i can not imagine when it may be useful..
is there any case study for it?

ciao!

]]> By: Grimesters http://dispatchevent.org/mims/the-quest-for-the-elusive-n-gleton/comment-page-1/#comment-139578 Grimesters Tue, 24 Feb 2009 10:41:26 +0000 http://dispatchevent.org/?p=638#comment-139578 The pattern you are thinking of is the Multiton... http://en.wikipedia.org/wiki/Multiton_pattern A Singleton isn't a complicated global variable; you simply use the Singleton pattern when you want to enforce the existence of one and only one instance of an object, and of course an object is data and behaviour encapsulated. Confusing Singletons with globals shows a lack of understanding about what an object is. If there should only ever be one instance of a CommsManager class for example, make it a Singleton. This guards against other developers, who may be maintaining your code in years to come, mistakenly creating two instances. If you are using your Singleton as some kind of glorified global variable then, yes, your object design is probably flawed - but I don't agree with blaming the pattern - blame the designer! The pattern you are thinking of is the Multiton…
http://en.wikipedia.org/wiki/Multiton_pattern
A Singleton isn’t a complicated global variable; you simply use the Singleton pattern when you want to enforce the existence of one and only one instance of an object, and of course an object is data and behaviour encapsulated. Confusing Singletons with globals shows a lack of understanding about what an object is. If there should only ever be one instance of a CommsManager class for example, make it a Singleton. This guards against other developers, who may be maintaining your code in years to come, mistakenly creating two instances. If you are using your Singleton as some kind of glorified global variable then, yes, your object design is probably flawed – but I don’t agree with blaming the pattern – blame the designer!

]]> By: Kelvin Luck http://dispatchevent.org/mims/the-quest-for-the-elusive-n-gleton/comment-page-1/#comment-139562 Kelvin Luck Tue, 24 Feb 2009 08:35:35 +0000 http://dispatchevent.org/?p=638#comment-139562 I used that pattern extensively in Flashr, my old AS2 wrapper for the flickr API. e.g. getPhoto in http://my-svn.assembla.com/svn/flashr/trunk/com/kelvinluck/flashr/core/Photo.as It was very useful in that situation (where you know that a photo with a given ID will always refer to the same object) and meant that I could update the photo from anywhere and know that it would be updated everywhere... I'd be interested to know if the pattern does have a "real" name though. I used that pattern extensively in Flashr, my old AS2 wrapper for the flickr API. e.g. getPhoto in http://my-svn.assembla.com/svn/flashr/trunk/com/kelvinluck/flashr/core/Photo.as

It was very useful in that situation (where you know that a photo with a given ID will always refer to the same object) and meant that I could update the photo from anywhere and know that it would be updated everywhere…

I’d be interested to know if the pattern does have a “real” name though.

]]> By: Patrick Pietens http://dispatchevent.org/mims/the-quest-for-the-elusive-n-gleton/comment-page-1/#comment-139559 Patrick Pietens Tue, 24 Feb 2009 07:57:42 +0000 http://dispatchevent.org/?p=638#comment-139559 Personally I would never use something like this. If I want to limit the number of instances I would go for a Factory class. Personally I would never use something like this. If I want to limit the number of instances I would go for a Factory class.

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