Subj : Re: variables and scopes
To   : Stuart
From : Igor Bukanov
Date : Thu Sep 23 2004 03:40 pm

Stuart wrote:
....
> 
> I have an application scope, a document scope and an anonymous scope
> (anonymous prototype is the document and the document prototype is the
> application).
> 
> On the application scope I ran (note I did not use: var rootCounter = 8):
> 
> 	context.evaluateString(appScope, "rootCounter = 8", "test", 1, null);
> 
> Then from the anonymous scope I run:
> 
> 	context.evaluateString(anonScope, "rootCounter = rootCounter + 1", "test",
> 1, null);
> 
> Then from the anonymous scope I get the value of:
> [Note: to get the value I used
> Object resultObject = ecmaContext.evaluateString(anonScope, "rootCounter",
> "test", 1, null);
> resultString = ecmaContext.toString(resultObject);]
> 
> 	rootCounter (this comes out as 9)
> 		-and-
> 	application.rootCounter (this comes out as 8)
> 
> Why would rootCounter and application.rootCounter have different values?
> Are they not the same?  There is alot of other stuff going on in my program
> so it may be something else that I am doing...but if you have any ideas
> please let me know.

In JS assign always set property at the head of prototype chain thus 
rootCounter = rootCounter + 1 will set rootCounter in the anonymous 
scope and not in your document/application scope.

Regards, Igor

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