.hover()

Bind one or two handlers to the matched elements, to be executed when the mouse pointer enters and leaves the elements.

jQuery()

Return a collection of matched elements either found in the DOM based on passed argument(s) or created by passing an HTML string.

jQuery.uniqueSort()

Sorts an array of DOM elements, in place, with the duplicates removed. Note that this only works on arrays of DOM elements, not strings or numbers.