jquery Each loop usage

In jquery we will often use each. Because each can loop through the contents of each selection. For example: $ ("P"). each (the function () {$ (this). HTML ("I was changed."); This is the current loop to the P.}; It's very simple to replace all the contents of P. Let's take another look at each. $ ("P"). each (the function (i,dom) {$ (this). HTML (i+ "-" +dom);});

Look at a checkbox using the jquery Each loop

$.each ($ (input:checked), function (i,n) {
alert (N.value); Effective
Alert (N.val ()); Invalid, why is this???
return false;
});

The above operation has the problem, corrects

$.each operations are generic objects, not jquery objects, so n is a DOM element

The jquery object is needed in this way:

$ (input:checked). each (function (i,n) {
Alert ($ (N). Val ()); Here n is to represent the DOM object plus $ to be converted to a jquery object
return false;
});