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For the function (function($){})(), I’ve seen it with the word jQuery in it, why is that?

Can someone explain the following syntax that is used in the jQuery source files? I am learning jQuery and trying to dive into writing a jquery.ui.widget.

(function ($)
{
    ... code ...
} (jQuery));

While I am using jQuery, this is really just a JavaScript question, I guess.

Thanks,
Craig

Answer 1

This defines an anonymous function with one argument, called $, then invokes the function passing jQuery as the argument.