also .. how that happened that Array.from is basically the equivalent of Array.from = Function.call.bind(Array.prototype.map); ?
Wasn't the initial reason to Array.from avoid the repeated all over everywhere [].slice.call(arguments) where a signature slice-alike would be more suitable so instead of Array.from(arguments).slice(1), as example, one would Array.from(arguments, 1) ? Thanks again :-) On Fri, Mar 8, 2013 at 3:26 PM, Andrea Giammarchi < [email protected]> 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 > <[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 2 >> 32 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 >> >> >> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> >> >
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
