On 16 February 2011 05:16, RobG <[email protected]> wrote:
>
> The main reason for using the grouping operator with functions that
> are executed immediately is that it lets humans reading the code know
> that when reading the first line of the function, as explained by
> Peter Michaux:
>
>
That's not *quite* right. In the OP's question, the form
(function () {
})();
was used. In this case, the parentheses are necessary to avoid a syntax
error (a function declaration needs a name and cannot be immediately
executed). If you're assigning the return value of the function to a
variable, then the parens are optional, and in that case I agree - they're
useful to let humans reading the code know that the function will be
executed immediately.
var x = (function () {
})();
Have a look at Ben Alman's piece on IIFEs for more details:
http://benalman.com/news/2010/11/immediately-invoked-function-expression/
--
Nick Morgan
http://skilldrick.co.uk
@skilldrick <http://twitter.com/skilldrick>
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