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.
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jQuery.hasData()
Determine whether an element has any jQuery data associated with it.
callbacks.remove()
Remove a callback or a collection of callbacks from a callback list.
.keyup()
Bind an event handler to the “keyup” JavaScript event, or trigger that event on an element.