I think using const for local variables that don't change is a good idea. I wish we had done it throughout the framework. In the future, it might allow the ActionScript compiler to do better optimization.
Gordon Smith Adobe Flex SDK Team From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Florian Sent: Friday, August 20, 2010 1:24 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] Re: Aspects of functional programming in ActionScript Well, the question was more intended to case like: function elementAddhandler(event:ElementExistenceEvent):void { const renderer:IVisualElement = event.renderer; } or function iterateOverList(list:IList):void { if (!list) return; const length:int = list.length; for (var i:int; i < length; i++) { trace(list.getItemAt(i)); } } I'm looking for reasons not to use constants in this context. --- In flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com>, Oleg Sivokon <olegsivo...@...> wrote: > > Despite this whole FP issue coming back into fashion in the last years, > there's really no use for that in ECMAScript-like languages. Every piece of > code you can write using nested functions can be rewritten in a way that no > nested functions will be used and the program will work better. > I'm not sure where would you need immutable objects, except date and string. > I'm not sure what kind of impact you were afraid of re' constants, but, sure > the constant which is not static is initialized as many times as it's scope > is initialized: > > function foo():void { > const bar:int = 100; > } > > bar initialized as many times as often you call foo(). > > class Foo { > private const bar:int = 100; > } > > bar is initialized as many times as often you create new Foo. > > If you need an example of intensive use of "closures" in AS3, look into > binding mechanism in Flex. It uses them a lot, and this is why it is bad. > Another example - Googlemaps, which is just another example of a lame code. > It is confusing to think that big corporation with many years of programming > experience would produce crappy code. I cannot tell why did this happen > exactly... but you know, lots of girls wear high heels, even though it's one > hell uncomfortable :) >
