Remove DOM elements from jQuery object

If you are talking about removing nodes from the jQuery object, use the filter or not functions. See here for more.

How to use filter:

var ps = $('p');

//Removes all elements from the set of matched elements that do 
//not match the specified function.
ps = ps.filter(function() {
  //return true to keep it, false to discard it
  //the logic is up to you.
});

or

var ps = $('p');

//Removes all elements from the set of matched elements that 
//do not match the specified expression(s).
ps = ps.filter('.selector');

How to use not:

var ps = $('p');

//Removes elements matching the specified expression 
//from the set of matched elements.
ps = ps.not('.selector');