JavaScript scope and closure

Question

I\'m trying to wrap my head around closures (there\'s a joke in there somewhere) and I ran across this:

(function () { /* do cool stuff */ })();

Answer 1

One closures approach is to pass variables to the function:

(function($, var_1, var_2) {
    // use JQuery, var_1 and var_2 as local variables
})($, var_1, var_2);