javascript/object-oriented/Expressive-JavaScript/2 - Functions as first-class objects.js at master · picUse/javascript · GitHub

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/* An anonymous function, executed immediately. */

(function() {

var foo = 10;

var bar = 2;

alert(foo * bar);

})();

/* An anonymous function with arguments. */

(function(foo, bar) {

alert(foo * bar);

})(10, 2);

/* An anonymous function that returns a value. */

var baz = (function(foo, bar) {

return foo * bar;

})(10, 2);

// baz will equal 20.

/* An anonymous function used as a closure. */

var baz;

(function() {

var foo = 10;

var bar = 2;

baz = function() {

return foo * bar;

};

})();

baz(); // baz can access foo and bar, even though is it executed outside of the

// anonymous function.