ok thanks, as i expected then.
Glad we agree it's counterintuitive, and although mtasc \^^\ oo /^^/ ROCKS,
i like as3 too much to go back though:))
thanks Ian
On Tue, Aug 18, 2009 at 10:43 AM, Ian Thomas <i...@eirias.net> wrote:
> JC,
> AS3 has no block scope.
>
> Whenever you write 'var x' inside a method, that declaration
> (effectively) gets moved to the 'top' of the method.
>
> So at a compiler level, this:
>
> > private function _demo():void {
> > for (var i:Number = 0; i < 10;i++) {
> > //evil stuff here
> > }
> > for (var i:Number = 0; i < 10;i++) {
> > //evil stuff here
> > }
> > }
>
> becomes this:
>
> private function _demo():void
> {
> var i:Number;
> var i:Number; /// Second definition!
> for (i=0;i<10;i++)
> {
> // Evil stuff
> }
> for (i=0;i<10;i++)
> {
> // Evil stuff
> }
> }
>
> And this:
>
> > private function _demo():void {
> > for (var i:int = 0; i < 10; i++)
> > {
> > trace (this[j]);
> > }
> > var j:Object = null;
> > }
>
> becomes this:
>
> private function _demo():void
> {
> var j:Object;
> var i:int;
> for (i=0;i<10;i++)
> {
> trace(this[j]);
> }
> j=null;
> }
>
> I find it totally counterintuitive. It's a language spec thing. It was
> the same in AS2 - although, interestingly, Nicolas Cannasse's MTASC
> compiler added block scope and made AS2 work 'properly' - so it's not
> like it's an issue at bytecode level.
>
> Ian
>
>
> On Tue, Aug 18, 2009 at 9:28 AM, Hans
> Wichman<j.c.wich...@objectpainters.com> wrote:
> > Hey list,
> >
> > does anyone know the cool rationale behind the fact that the compiler
> won't
> > allow me to execute a completely sane piece of code such as:
> >
> > private function _demo():void {
> > for (var i:Number = 0; i < 10;i++) {
> > //evil stuff here
> > }
> > for (var i:Number = 0; i < 10;i++) {
> > //evil stuff here
> > }
> > }
> >
> > (getting a redefined blablah variable, to which there is no workaround
> but
> > to rename the loop variables I think)
> >
> > But WILL allow me to do something stupid like:
> >
> > private function _demo():void {
> > for (var i:int = 0; i < 10; i++)
> > {
> > trace (this[j]);
> > }
> > var j:Object = null;
> > }
> >
> >
> > :)
> >
> > JC
> > _______________________________________________
> > Flashcoders mailing list
> > Flashcoders@chattyfig.figleaf.com
> > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
> >
>
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