jQuery Forum

New to jQuery, I don't quite understand some things (OK, a lot of things).

I have a bunch of <a>s within a <div id="myDiv"> and want to throw away the last one. My code is:

1.         try {
2.             $("#myDiv a").last().remove();
3.         } catch (e) {
4.             alert(e);
5.         }

I get an error saying that last() is not a function.

So, I change line 2 to:
      $("#myDiv a:last").remove();
I get no error but nothing was removed.

Checking out the forum, I then try this version of line 2:
      $("#myDiv a :last-child").remove();
And, that works.

But, that leaves some questions:

1. I believe last() is a function relating to a wrapped set but why did I get that error?
2. If :last doesn't want to return the last element of a wrapped set, what does it return? And why did remove() do diddly; was it passed an empty set so it took a break?