Four variations of jQuery ready() — what's the difference?

Question

I\'ve seen four different ways to tell jQuery to execute a function when the document is ready. Are these all equivalent?

$(document).ready(function () {
           


        

Answer 1

Here's another one - starts like this...

(function (jQuery) {

then to finish...

})(jQuery);

An example is here: http://jsfiddle.net/C2qZw/23/