start javascript code with $(function, etc

Question

I am studying Backbone and the todo example apps from http://todomvc.com/ I have noticed there are 3 severals ways of starting the code in the files:

$(funct         


        

Answer 1

These two:

$(function() {
 // code here
});

$(document).ready(function(){
  // code here
});

Are directly equivalent, they are both the way to start some jQuery when the document has loaded. The former is just a shorter version of the latter.

This one:

(function() {
 // code here
}());

is just a scoped function with zero parameters, which is immediately called with zero parameters.