Updates:
Status: Duplicate
Owner: [email protected]
Cc: [email protected]
Mergedinto: 621
Comment #3 on issue 2532 by [email protected]: Create Map object
that does not have __proto__ quirk
http://code.google.com/p/v8/issues/detail?id=2532
In response to you original example: JSON.parse() no longer special-cases
the "__proto__" property on V8 bleeding edge since r13728 (i.e. landed just
a few hours ago). With this change the object returned by JSON.parse() in
you original example will have two own properties (i.e. "__proto__"
and "toString"). This is in line with the ES6 draft, as JSON.parse() is
defined using [[DefineOwnProperty]].
As to your idea of having a separate Map object: I would encourage you to
look at Harmony Maps which are also part of the current ES6 draft. You
could leverage those to get the behavior of full-featured collections.
http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets
I am marking this issue as a dupe of issue 621 as it is mostly about
JSON.parse() behavior.
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