Re: [Flashcoders] Variable scope within for loops: reusing iterator variables
besides, the compiler only warns you that you're about the overwrite the variable, by re-assigning it. In case of 2 loops(where the variable is only used within the loop), it doesn't have any real consequences. On Mon, Mar 24, 2008 at 4:56 PM, Cory Petosky <[EMAIL PROTECTED]> wrote: > Jonathon: > > In any other language, the scope would be as you describe. AS3 doesn't > have block-level scoping -- the most local scope is always the > function. Declaring a variable anywhere but the first line of a > function is a lie -- the VM declares all variables as the first set of > operations after pushing the function call on the stack. > > On Mon, Mar 24, 2008 at 7:36 AM, Andrew Sinning <[EMAIL PROTECTED]> > wrote: > > You are correct Jonathan, but loop blocks are delimited by brackets, so > > the "for ( ... )" declaration is outside of the loop block. > > > > > > jonathan howe wrote: > > > I had always thought that the scope of variables declared in the > > > initialization part of the for loop were local to the loop block > > > > > > > > ___ > > Flashcoders mailing list > > [email protected] > > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > > > > > -- > Cory Petosky : Lead Developer : PUNY > 1618 Central Ave NE Suite 130 > Minneapolis, MN 55413 > Office: 612.216.3924 > Mobile: 240.422.9652 > Fax: 612.605.9216 > http://www.punyentertainment.com > ___ > Flashcoders mailing list > [email protected] > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > -- M.A. van't Kruis http://www.malatze.nl/ ___ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Variable scope within for loops: reusing iterator variables
Jonathon: In any other language, the scope would be as you describe. AS3 doesn't have block-level scoping -- the most local scope is always the function. Declaring a variable anywhere but the first line of a function is a lie -- the VM declares all variables as the first set of operations after pushing the function call on the stack. On Mon, Mar 24, 2008 at 7:36 AM, Andrew Sinning <[EMAIL PROTECTED]> wrote: > You are correct Jonathan, but loop blocks are delimited by brackets, so > the "for ( ... )" declaration is outside of the loop block. > > > jonathan howe wrote: > > I had always thought that the scope of variables declared in the > > initialization part of the for loop were local to the loop block > > > > ___ > Flashcoders mailing list > [email protected] > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > -- Cory Petosky : Lead Developer : PUNY 1618 Central Ave NE Suite 130 Minneapolis, MN 55413 Office: 612.216.3924 Mobile: 240.422.9652 Fax: 612.605.9216 http://www.punyentertainment.com ___ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Variable scope within for loops: reusing iterator variables
You are correct Jonathan, but loop blocks are delimited by brackets, so the "for ( ... )" declaration is outside of the loop block. jonathan howe wrote: I had always thought that the scope of variables declared in the initialization part of the for loop were local to the loop block ___ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
RE: [Flashcoders] Variable scope within for loops: reusing iterator variables
jonathan howe wrote:
> I was hoping someone could explain why I get "Warning: 3596: Duplicate
> variable definition." warnings when I reuse an iterator variable.
> Example:
>
> for (var i:int = 0; i < someArray.length; i ++) {
> // do something cool
> }
>
> for (var i:int = 0; i < someOtherArray.length; i ++) {
> // do something even cooler
> }
The first time you declare the var i, it is in scope for the rest of the
function, not the loop. Think of it this way:
function someFunc():void
{
.
.
.
var i:int;
for (i = 0; i < someArray.length; i ++) {
// do something cool
}
for (i = 0; i < someOtherArray.length; i ++) {
// do something even cooler
}
}
Make sense?
Cordially,
Kerry Thompson
___
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