misunderstanding about "with"

[omniscient232]

i thought that what "with (myObj){statements}" does making myObj execute statements. however this seems to not be completely true:
i have 2 vars with the same name: myVar
one is in class mainClass, the other is declared in the with statements. when i change myVar within the with statements, and trace it, back in mainClass the change to the var myVar in mainClass is (also?) made.
so what does with do really?

[sstalder]

with (obj) {} is used to set properties on the object, not execute statements.

example:

with(obj) {
    alpha = 0;
    visible = false;
    x = 0;
    y = 0;
} 

[neznein9]

With only affects properties and methods. For example, this doesn't work because var a is defined twice in the same namespace (you can't say m.var a = ""):

var m:MovieClip = new MovieClip();
var a:String = 'outside';

with(m){
    var a:String = 'inside';
    trace(a);
}

trace(a, m.a); 

This does work because you have created the property on mc before going into the with statement:

var m:MovieClip = new MovieClip();
var a:String = 'outside';

m.a = new String();

with(m){
    a = 'inside';
    trace(a);
}

trace(a, m.a); 

[omniscient232]

but when i do:

var bb:int =5;
with (myObj)
{
trace (bb);
} 

it gives: undefined.

[neznein9]

The same just worked for me:

var m:MovieClip = new MovieClip();
var a:String = 'outside';

with(m){
    trace(a);
} 

Are you using a custom class? Is it dynamic or does it already have a public param/method with the same name?

[sstalder]

Post your FLA file - you must be missing something.

Make sure myObj exists on the stage, otherwise it would work.

[omniscient232]

public class MainClass extends MovieClip
    {
        private var t1e:Number;
        var bla1:AccDirSpd = new AccDirSpd();
        public function MainClass()
        {
            t1e = 5;
            trace(t1e);
            with (bla1)
            {
                trace(t1e);
                var 
                t1e:Number;
                                t1e = 7;
                                trace(t1e);
            }
            trace(t1e);
}
} 

AccDirSpd class has no t1e var.

[sstalder]

What does this give you?

public class MainClass extends MovieClip
{
    private var bla1:AccDirSpd = new AccDirSpd();
    private var t1e:Number;
    
    public function MainClass()
    {
        with (bla1)
        {
            t1e = 7;
            trace(t1e);
        }
    }
} 

[omniscient232]

7. and out of the with statement also 7