On Tue, Apr 12, 2011 at 3:57 AM, Lasse Reichstein < [email protected]> wrote:
> On Tue, 12 Apr 2011 07:55:26 +0200, Allen Wirfs-Brock < > [email protected]> wrote: > > >> On Apr 11, 2011, at 6:45 PM, Axel Rauschmayer wrote: >> >> var obj={}.valueOf.call(obj); // ToObject in case primitive value passed >>>> >>> ... > > {}.valueOf is the same value as Object.prototype.valueOf assuming none of >> the standard definitions have been over-written. See the comment thread of >> http://www.wirfs-brock.com/allen/posts/166 for a debate as to which of >> these forms is more or less optimizable. >> >> Object.prototype.valueOf as specified is essentially a call to the >> internal ToObject operation that wrappers primitive values. I put it in to >> deal with cases like getDefiningObject("some string", "match") >> > > > In that case, why not just > obj = Object(obj); > > It has the added advantage of not returning the global object for null and > undefined, > For null and undefined, Object.prototype.valueOf throws. It does not return the global object. > but just a plain new object (although either can be said to be wrong in > this case). > > /L > -- > Lasse Reichstein - [email protected] > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > -- Cheers, --MarkM
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