Since no one is correcting me, I will do it myself, again :)
We always have to pass an array to pushStack because it will ensure
that the value will not processed as an selector or html or document,
but simply as an array with values to set.
eq: function( i ) {
var j = i < 0 ? +i + this.length : i,
el = j in this ? [ this[j] ] : [];
return this.pushStack( el, 'eq', i )
}
We maybe can make an exception if the value is a node:
eq: function( i ) {
var j = i < 0 ? +i + this.length : i,
el = this[ j ];
el = ( j in this ) ? ( el && el.nodeType ? el : [el] ) : [];
return this.pushStack( el, 'eq', i )
}
However, not sure if this solutions are significantly faster then the
solution with slicing.
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