On Wed, Jun 4, 2014 at 9:49 AM, Jonas Sicking <[email protected]> wrote: > On Wed, Jun 4, 2014 at 12:31 AM, Anne van Kesteren <[email protected]> wrote: >> Does ES define the order of { "x": "a", "y": "b" } btw? > > I believe so, but someone would need to check. Either way I think > browsers effectively are forced to return a consistent order for > web-compat reasons.
I checked. It's not true, see http://esdiscuss.org/topic/for-in-evaluation-order#content-10 See http://people.mozilla.org/~jorendorff/es6-draft.html#sec-ordinary-object-internal-methods-and-internal-slots-enumerate for the specification. It seems in particular implementations will differ on numeric "keys", potentially other bits. -- http://annevankesteren.nl/
