Reference Shared Object AS3

Question

I am trying to reference a shared object (one that saves data), but whenever I try to, I get a crash.

This code works fine:

var var1:Object = { value:1 };
var varRef:Object = var1;

if(var1.value == 1) {
    varRef.value = 50;
}

trace(varRef.value); // outputs 50;
trace(var1.value); // outputs 50;

But when I try to use shared objects, it doesn't work.

import flash.net.SharedObject;
var iapso:SharedObject = SharedObject.getLocal("purchases");
var varRef:Object = iapso.data.testing;

varRef = 90
trace ("The shared value is " + iapso.data.testing);
trace ("This should mirror it" + varRef);

If you're able to figure out the issue, please post a fixed version.

Thanks.

Jason Sturges · Accepted Answer · 2012-07-09 06:53:20Z

4

You must come from a programming background where pointers can be dereferenced.

In this case, varRef is not varRef = &iapso. Setting its value does not change the value of iapso.data.testing;

Initially, you set varRef as a pointer to iapso.data.testing:

var varRef:Object = iapso.data.testing;

Then, you immediately change it to a constant value object literal 90:

varRef = 90;

This does not set the value of testing to 90 - this changes the value of varRef.

You could set varRef to iapso.data, then set testing as in:

var varRef:Object = iapso.data;
varRef.testing = 90;

Then, the following would produced expected results:

trace(iapso.data.testing); // 90
trace(varRef.testing); // 90

answered Jul 9, 2012 at 6:53

Jason Sturges

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1 Comment

user1508405 Over a year ago

Jason Sturges you did it again! Great answer.

Jonatan Hedborg · Accepted Answer · 2012-07-09 06:53:28Z

2

setting varRef will not update the value in iapso.data - numbers are copied, not referenced.

var bar:Object = { data:1 };
var foo:Object = bar.data;

trace(foo); //"1"
bar.data = 2;
trace(foo); //"1"

If you really want to use a reference, use data instead, eg:

import flash.net.SharedObject;
var iapso:SharedObject = SharedObject.getLocal("purchases");
var varRef:Object = iapso.data;

varRef.testing = 90
trace ("The shared value is " + iapso.data.testing);
trace ("This should mirror it" + varRef.testing);

answered Jul 9, 2012 at 6:53

Jonatan Hedborg

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