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 <[email protected]>wrote:
> The March 8, 2013 Rev 14 draft is now available at the usual place:
> http://wiki.ecmascript.org/doku.php?id=harmony:specification_drafts
>
> 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 Object.is 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 *Typed*Array object length no long restricted to
> 232limit
> - 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
>
>
>
> _______________________________________________
> es-discuss mailing list
> [email protected]
> https://mail.mozilla.org/listinfo/es-discuss
>
>
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