jQuery document ready functions

what are the differences (if any) for the following jQue开发者_开发知识库ry document ready functions:

$("document").ready(function() {}); and $(function() {});

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They are equivalent, the later is a shorthand form for the first.

From the jQuery documentation:

All three of the following syntaxes are equivalent:

$(document).ready(handler)
$().ready(handler) (this is not recommended)
$(handler)

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The only difference is brevity. http://api.jquery.com/jQuery/#jQuery3

jQuery( callback )

This function behaves just like $(document).ready(), in that it should be used to wrap other $() operations on your page that depend on the DOM being ready. While this function is, technically, chainable, there really isn't much use for chaining against it.

_{(emphasis added)}

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They are the same. Check out: http://api.jquery.com/jQuery/#jQuery3

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They're the same; as stated earlier, the latter is merely a shorthand version of the former.

I prefer using the expanded version, as I feel it makes code easier to read.

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Its the same. Different names to do the same thing

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$(afunc) just calls $(document).ready(afunc); after 4 if statements which don't get entered since afunc is a function.

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$(document).ready(function(){})
$().ready(function(){}) (this is not recommended)
$(function(){})