Patch welcomed.

On Oct 14, 10:45 pm, Andy E <andyearns...@gmail.com> wrote:
> I recently discovered that several compatibility implementations of
> Object.keys() on the web will throw an error for DOM objects in
> Internet Explorer 8 and lower.  This differs from the current browsers
> having a native implementation and how the ECMAScript 5th edition
> defines the behaviour of Object.keys.
>
> The problem lies with the hasOwnProperty() check, which is not a valid
> method on Internet Explorer DOM objects because they aren't instances
> of Object.  The fix is very simple; "borrow"  hasOwnProperty() from
> Object.prototype.hasOwnProperty() instead.  The fixed PrototypeJS
> implementation would be:
>
>   function keys(object) {
>     if (Type(object) !== OBJECT_TYPE) { throw new TypeError(); }
>     var results = [];
>     for (var property in object) {
>       if (object.prototype.hasOwnProperty.call(object, property)) {
>         results.push(property);
>       }
>     }
>     return results;
>   }
>
> I've outlined the issue in more detail on my 
> blog:http://whattheheadsaid.com/2010/10/a-safer-object-keys-compatibility-....
>
> Cheers,
>
> Andy E

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