On Fri, Jan 20, 2012 at 10:46, Herby Vojčík <[email protected]> wrote:
> No, I asked for something else. How do it do: "get a private property of
> <<foo>> whose name is computed by <<expression>>"? Something like
> foo.@[expr]? Or is there no way to do it?
> In other words, what is [] syntax for foo.@bar? foo.@["bar"]? foo["@bar"]?
@bar is a shorthand[*] for this[bar]
object.@bar is a shorthand[*] for object[bar]
There is no way to compute a string "bar" to do the lookup since that
would break private name encapsulation:
let object = ...
{
let key = Name.create()
let secret = {}
object.@key = secret
}
There must be no way to get access to secret here.
[*] Using @ does not really invoke []. That is important if private
names are going to work with the extended collection proposals Allen
proposed.
http://wiki.ecmascript.org/doku.php?id=strawman:object_model_reformation
--
erik
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