Subj : scope aliases
To   : netscape.public.mozilla.jseng
From : Stuart
Date : Sat Sep 04 2004 12:34 pm

Hi,

Earlier I asked some questions regarding scopes, now that I have worked with
them some more I have a couple more questions.

(1) Can a scope alias be renamed? e.g.

If initially I set the alias of myScope to "document":

	ScriptableObject.putProperty(myScope, "document", myScope);

In some circumstances I need to temporarily alias the above scope as
"application"

	ScriptableObject.deleteProperty(myScope, "document");
	ScriptableObject.putProperty(myScope, "application", myScope);

Will any vars defined keep their values after the 're-name'?

--> As an after thought it would be even better if myScope could be shallow
copied so that I could have two scopes one aliased as "document" the other
as "application" (but internally they have the same information and if I
change document.x=5 then application.x will also equal 5) - Is this
possible? (FYI: I can live with just re-name, I'm just being lazy!)

(2) Apparently in ECMAScript "document.x" is an illegal variable name (e.g.
var document.x).  Is this correct?

If I had a scope aliased as "document" and a var called x, I could use the
'variable name' "document.x" in my script e.g.

	document.x = 5

Assuming this is correct.  If I wanted to define the following variable
names in document scope how can it be done e.g.

	user.first  (so this could be referenced as document.user.first or simply
as user.first)
	user.last    "
	user.age	 "

Based on what ECMAScript says is an illegal variable name I'm assuming I
could not use:

	ScriptableObject.defineProperty(docScope, "user.first", "Bob", 0);

Your help will be much appreciated.

Cheers,

Stuart

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