Lastest ES6 draft (rev 14) now available

Allen Wirfs-Brock allen at
Fri Mar 8 15:55:20 PST 2013

not exactly, you'd have to use getOwnPropertyKeys rather than getOwnPropertyNames.  Also it "rebinds" super references to from source object to target objects.
On Mar 8, 2013, at 3:26 PM, Andrea Giammarchi wrote:

> am I understanding mixin correctly?
> 'mixin' in Object || (Object.mixin = function mixin(
>   target, source
> ) {
>   for(var
>     keys = Object.getOwnPropertyNames(source),
>     i = keys.length; i--; Object.defineProperty(
>       target,
>       keys[i],
>       Object.getOwnPropertyDescriptor(
>         source,
>         keys[i]
>       )
>     )
>   );
>   return target;
> });
> thanks
> On Fri, Mar 8, 2013 at 2:35 PM, Allen Wirfs-Brock <allen at> wrote:
> The March 8, 2013 Rev 14 draft is now available at the usual place: 
> Changes include:
> Class bodies are now always string
> static methods may now be defined in ClassBody
> Updated comprehension syntax to use left-to-right order
> Eliminated is and isnt operators
> added grammar productions to allow unqualified super to be used after new operator
> expression to the right of of in for-of now restricted to being AssignmentExpression
> Almost all Chapter 15 constructors are now specified to have an @@create methid and are initialized in a manner that supports subclassing. (still need to work on Function)
> Added Object.getOwnPropertyKeys function
> Added function
> Tentatively added Object.mixin function
> Array.from now takes an optional map function
> Added String.prototype.normalize method
> All String.prototype methods that accept RegExp arguments will now work with subclasses of RegExp
> Renamed Number.prototype.toInt to Number.prototype.toInteger
> RegExp global, ignoreCase, multiline, source, sticky are now prototype accessor properties rather than instance own data properties. This is needed to support adding web compatible compile method.
> Added new RegExp.prototype methods that allow string methods to work with RegExp subclasses: match, replace, search, split, @@isRegExp
> Map and Set constructors now accept a =n optional comparator parameter. Only value currently allowed is “is”
> ArrayBuffer and TypedArray object length no long restricted to 232 limit
> Eliminated all remaining references to [[Class]] and [[NativeBrand]] (except for in some DataView code that needs rewritting anyway)
> Added SameValueZero abstraction operation that considers -0 and +0 to be the same value.
> Rename [[GetP]] to [[Get]] and [[SetP]] to [[Set]]
> Specified that unless otherwise indicated, internal data properties are created when an object is allocated. Internal data properties are now explicitly listed in ObjectCreate abstract operation calls.
> internally consolidated [[IsExtensible]]/[[IsSealed]/[[IsFrozen]] and [[PreventExtensions]]/[[Seal]]/[[Freeze]] into two MOP operations [[HasIntegrity]] and [[SetIntegrity]]. However, no public APIs (Proxy traps and Reflect functions) changed.
> Numerous editorial and technical corrections, clarifications, and bug fixes
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