What design pattern is this code in Javascript?

Question

What kind of a design pattern is this and what is the significance of using this closure?

(function(){
    // my code here
}).call(this);

Edit

Then what is the difference between the above code and the following as the this keyword will still refer to the same object in both the ways.

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

Thanks. I think I need to hone my search skills – Atif Jul 10 '13 at 19:38 — Atif, Jul 10 '13 at 19:38
Your question is still identical to the linked one. – zzzzBov Jul 10 '13 at 20:42 — zzzzBov, Jul 10 '13 at 20:42

Ben McCormick · Answer 1 · 2013-07-10T22:15:46.943

7

Thats an immediately invoked function expression.

More info here: http://benalman.com/news/2010/11/immediately-invoked-function-expression/

The purpose is to run code immediately while protecting scope (so variables declared within don't leak out to the global scope.

Update

call sets the value of this for the function its being applied on. Without it, the value is set to the window object, with it there it is set to the outer scope.

edited Jul 10 '13 at 22:15

answered Jul 10 '13 at 19:36

Ben McCormick

25,260
12
52
71

http://benalman.com/news/2010/11/immediately-invoked-function-expression/ – zzzzBov Jul 10 '13 at 19:37
@zzzzBov independently put up the same link. Thanks though. – Ben McCormick Jul 10 '13 at 19:38
Can you check the edit I made – Atif Jul 10 '13 at 19:41

What design pattern is this code in Javascript?

Edit

1 Answers1

Update