Placed here for my own reference as it's so dang hard to find things in the YUI documentation. Further, when I do find these methods of Node in the YUI documentation, there are no accompanying examples, and I have to spend 15 minutes verifying that the method works as desired.
For example, compare http://api.jquery.com/index/ with http://yuilibrary.com/yui/docs/api/classes/LazyModelList.html#method_indexOf.
jQuery
var $selection = $('.selector'); var refined = $selection.find('a');
YUI
var $selection = Y.all('.selector'); var refined = $selection.filter('a');
jQuery
var $selection = $('.selector'); var $index = $selection.index('a');
YUI
var $selection = Y.all('.selector'); var refined = $selection.indexOf('a');
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