Comments on: Proper private constructors for ActionScript 3.0

By: Bad... very bad.

Bad... very bad. — Tue, 10 Dec 2013 11:50:57 +0000

class Singleton {
public function Singletor(lock:Class) {
if(lock != PrivateConstruct) throw new Error…
}
}
class PrivateConstruct {}

By: Flex Expert

Flex Expert — Sat, 23 May 2009 21:17:54 +0000

Great trick !

Nice job !

By: cdude

cdude — Tue, 31 Mar 2009 09:30:22 +0000

cool trick. Thanks for sharing. I was looking for a way to do the private constructor singleton thing in AS3 like I did AS2 – while not perfect, this will certainly do the trick. :)

By: bernie

bernie — Thu, 29 Nov 2007 18:20:49 +0000

True. Old school JavaScript was a great language for hacking language features, from automagical memoization to AOP, if you understood it well enough. This just carries on in the same tradition.

By: Eric Feminella

Eric Feminella — Thu, 29 Nov 2007 18:13:17 +0000

The lack of actual Language constructs is a frustrating limitation of ActionScript 3, however, the limitations are helpful in that they force us to dig down a little deeper into the language to find what we can use to develop creative solutions to these limitations. It’s a fun challenge.

I also wrote a post awhile back which explains a way to create Abstracts in AS3 which you guys might find helpful as well.

http://www.ericfeminella.com/blog/2007/01/16/pseudo-abstract-classes-in-as3/

By: bernie

bernie — Thu, 29 Nov 2007 17:14:16 +0000

Awesome, that Eric Feminella version is exactly what I needed; it is better than my solution anyway, if not as good as real private constructors.

By: shaun

shaun — Thu, 29 Nov 2007 17:05:53 +0000

hey, just stumbled across this post:

http://www.darronschall.com/weblog/archives/000274.cfm

an interesting read, with links to other interesting reads :)

By: shaun

shaun — Wed, 28 Nov 2007 20:58:50 +0000

haha! i know what you mean!

By: bernie

bernie — Wed, 28 Nov 2007 18:43:45 +0000

Oops! good spot, fixed now. I’ve been going all int happy since AS3 came out, I forget that floating point numbers exist sometimes.

By: shaun

shaun — Wed, 28 Nov 2007 18:36:13 +0000

nice one! i’ve seen quite a couple of solutions to this problem, but i like the creativity of yours! surely the enforcer should be a Number though – casting the result of Math.random() to an int will always give you 0, rendering the enforcer useless ;)