I figured out (unfortunately not before) that the main reason why the
current implementation uses slicing is to ensure correct behavior in
case of "index out of range" and in case of !this[i].
Here proposed solutions will not return an empty jquery in that cases,
but an jquery with the document element.
Maybe this would be more appropriate:
eq: function( i ) {
return this.pushStack( i == -1 ? arraySlice.call(this, i) :
arraySlice.call(this, i, +i + 1), 'eq', i )
}
Unfortunately this looks dirty with no significant performance
improvements in respect of the first solution I purposed on
http://dev.jquery.com/ticket/4188.
Any better idea?
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