Contacts API -- attribute order

Mark S. Miller erights at google.com
Thu Aug 25 07:56:11 PDT 2011


[+es-discuss]

On Thu, Aug 25, 2011 at 2:40 AM, Cameron McCormack <cam at mcc.id.au> wrote:

> +cc public-script-coord
> -cc,+bcc public-device-apis
>
> On 25/08/11 7:38 PM, Andreas Gal wrote:
>
>> We should take this to the WebIDL list then. The order definitely
>> matters in practice for interoperability if people do for-in over DOM
>> objects. I had to debug breakage due to shifting properties around in
>> our DOM IDL before.
>>
>
> OK.  I avoided specifying enumeration order to avoid stepping on the
> ECMAScript spec's given that it was likely to specify an order in the
> future.  Do you know what kind of order is required?
>

+1 to leaving this issue to a future EcmaScript spec to pin down. The
current strawman, which is unfortunately not on the table for ES6, is <
http://wiki.ecmascript.org/doku.php?id=strawman:enumeration>. I encourage
implementors to follow this when possible and post to the list cases where
it isn't. If we can get all implementors on board with this, as least for
strict or ES6 for/in loops, then it becomes de facto and would become a
shoo-in for ES7.

Andreas, IIRC, you ran into a case in *Monkey where you did decide to
deviate from this strawman for efficiency reasons. Could you explain the
issue? Is there a standardizable variant of that strawman that you could
implement efficiently and that we could get broad agreement on? If so, we
should try.

-- 
    Cheers,
    --MarkM
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