jQuery selector: all links in first paragraph

I would like t开发者_开发百科o apply doSomething() to every link of the first paragraph, using jQuery. This is what I have tried:

var firstParagraph = $("p").eq(0);
firstParagraph.$("a").doSomething();

What's the correct format? (P.S. Where can I learn about such selectors in more depth?)

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You can also do:

var anchors = $('p:first a');

And there's more on selectors here:

http://api.jquery.com/category/selectors/

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firstParagraph.find("a").doSomething();

Also you might use shorthand:

var links = $("p:first a");

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The easiest way to do precise element selection is with the CSS selectors inside of $(...). For instance, to hide all links in the first paragraph, do this

$('p:first-child a').hide();

But watch out, this will hide probably more than you want. It would affect the first paragraph in any div, for instance. If you want to hide only the first paragraph of the HTML body and not first paragraphs of subelements of the page, do either of these

$('body > p:first-child a').hide();  // first paragraph in body
$('p:first a').hide();               // first paragraph anywhere, but only once

These selectors (except :first) are jQuery agnostic. You can read about them here.