jQueryready（）的四种变体-有什么区别？-FourvariationsofjQueryready()—what'sthedifference?

There is no difference.

没有区别。

$ is the same as jQuery. If you view the unminified source, you will see var $ = jQuery = ... or something to that effect.

$与jQuery相同。如果您查看未经授权的源,您将看到var $ = jQuery = ...或其他相似内容。

The jQuery function checks the type of it's parameter, if it is a function, it treats it the same as $(document).ready(...)

jQuery函数检查它的参数类型,如果它是一个函数,它将它视为$(document).ready(...)

Calling jQuery without a parameter defaults to using document. So $() and $(document) are identical. Try it in Firebug.

在没有参数的情况下调用jQuery默认使用document。所以$()和$(文档)是相同的。在Firebug中尝试一下。

re: Geroge IV's comments regarding $() == $(document) its correct. From the unminified source (init is what get called internally):

re:Geroge IV关于$()== $(文档)正确的评论。从未公开的源(init是内部调用的):

init: function( selector, context ) {
    // Make sure that a selection was provided
    selector = selector || document;

Also from source, to back up previous conversations:

同样来自源代码,以备份之前的对话:

// HANDLE: $(function)
    // Shortcut for document ready
    } else if ( jQuery.isFunction( selector ) )
        return jQuery( document ).ready( selector );

this should be community wiki. I've always been interested in the inner workings of jquery, now I've had an excuse to start looking :-)

这应该是社区维基。我一直对jquery的内部工作感兴趣,现在我有借口开始寻找:-)

Here's another one - starts like this...

这是另一个 - 从这样开始......

(function (jQuery) {

then to finish...

然后完成......

})(jQuery);

An example is here: http://jsfiddle.net/C2qZw/23/

这里有一个例子:http://jsfiddle.net/C2qZw/23/

Also it should be mentioned, that symbol that you pass to function will be use inside the function. For example:

还应该提到的是,传递给函数的符号将在函数内部使用。例如:

$(function(jQuery) {
   // now I can use jQuery instead $
   jQuery("body").append("
"); // adds div to the end of body element
}); 

if you want use $ - you can leave function's param in this situation empty

如果你想使用$ - 你可以在这种情况下将函数的参数留空

The real example you can find here http://jsfiddle.net/yura_syedin/BNgd4/

你可以在这里找到真正的例子http://jsfiddle.net/yura_syedin/BNgd4/