Strawman: Decouple [ ] and property access

Erik Arvidsson erik.arvidsson at
Fri Nov 11 10:02:57 PST 2011

I implemented this for Traceur last week. The abstraction is leaky
since Traceur does not have private names yet but it is still good
enough for a demo.

Instead of private names we just use Object.define*

On Fri, Nov 11, 2011 at 08:56, Axel Rauschmayer <axel at> wrote:
> That the [] decoupling is needed can by seen by the fact that dicts can’t
> have a size() method (as opposed to the dictionary solution in the
> strawman).
> On Nov 11, 2011, at 17:45 , Allen Wirfs-Brock wrote:
> thanks, a good suggestion.
> Actually they are quite different.  The dict proposal is simply defining one
> new data types that can be used as a key value store which is guaranteed not
> to have any pre-existing key conflicts prior to initial use.
> My proposal, defines a general extensible mechanism that  JS programmers can
> use to define many kinds of new collection abstractions all of which use a
> consistent accessing syntax whose semantics is completely under the control
> of the programmer.
> A comparison to 'dict' which shares the expressed goals of the above
> proposal would be a great addition. Roughly speaking it appears to be
> "more ambitious than", meaning more effort and more power.
> --
> Dr. Axel Rauschmayer
> axel at
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