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It's the terrible nature of AS2. Variables should never exist outside their scope.
e.g.
function foo() {
var a = "Hello";
}
foo(); // 'a' is created in the function but once it exits it's gone
trace(a); // undefined
That's obvious to understand. The function runs, creates a variable inside the function but when the function exists the variable is discarded.
Now, as a convenience the look ahead compiler will let you get away with something like this:
function foo()
{
var a = "something"; // at timeline scope in a frame script but inside a function so 'a' will be nuked at the end
myButton.onPress = function() {
// inside myButton function which has nothing to do with foo()s scope so it shouldn't exist
myButton.a = a; // assign a property to myButton (which should be 'this') and set it to "something"
// just using myButton here (from inside itself) should error, it makes no sense, but flash "fixes" it for you
};
}
foo();
trace(a); // undefined
myButton.onPress();
trace(a); // undefined
trace(myButton.a); // "something"
AS2 is just wacky with this stuff. Even though you go in and out of scopes the compiler figures out what you meant (sometimes) and lets you think that it was kosher to do what you did when in general programming it isn't.
Ditch it and run to AS3 as soon as possible. You're only 6 or so years off
. Not much of this wacky scope crap exists anymore. | -
sinious wrote:
Ditch it (AS2) and run to AS3 as soon as possible. You're only 6 or so years off
. Not much of this wacky scope crap exists anymore. Yea, the only reason I'm using AS2 is because this project was originally done by someone else in AS2. Unforunatley the fla is poorly documented and I've spent more time trying to figure out how to make what he did do what I want than I would have if I had just start from scratch porting it to AS3. Thanks for your help
Joel
|
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