What is the difference between $.each(selector) and $(selector).each()

Question

What is the difference between this:

$.each($(\'#myTable input[name=\"deleteItem[]\"]:checked\').do_something());

and this:

Answer 1

from http://api.jquery.com/jQuery.each:

The $.each() function is not the same as .each(), which is used to iterate, exclusively, over a jQuery object. The $.each() function can be used to iterate over any collection, whether it is a map (JavaScript object) or an array.