Looping through all tagnames AND one ID

[csdude55]

I have a loop like this:

$('p').each(function() { ... });

But how do I set it to loop through all of the p tags AND $('#whatever')?

I'm currently doing this, but there has to be a way to do them both at once:

$('p').each(function() {
 runFunc($(this));
});

if ($('#whatever').length) {
 runFunc($('whatever'));
}

[Fotiman]

The selector is just how you would write it in CSS to style p elements and ID 'whatever':
p, #whatever

So:
$('p, #whatever').each(...)