JQuery: selection within a selection

Question

I have an array of different elements saved from a previous selection, name it. ' a'

How to make the next selection from this previous selection ( a) and just return type elements input?

Answer 1

a.filter('input').each(function() {
    alert('My name is ' + $(this).attr('name'));
});

To simply select a selection from the current selection this way:

var $inputs = a.filter('input');

You can even comma separate selectors:

var $els = a.filter('input, .fooMonger, #something');

See http://docs.jquery.com/Traversing/filter

Answer 2

$('input', a);

Answer 3

$(a).find("input")