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,
but just a plain new object (although either can be said to be wrong in
this case).
/L
--
Lasse Reichstein - [email protected]
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