Not just the name, the entire function declaration is hoisted. That's the difference between:

    function () {
      ...
      var a = function () {};
    }

which gets hoisted to:

    function () {
      var a;
      ...
      a = function () {};
    }

and:

    function () {
      ...
      function a () { };
    }

Which gets hoisted in it's entirety to:

    function () {
      function a () { };
      ...
    }

Which will cause difference behaviour between the two when calling a in the ... section, working in the latter case but undefined in the first.

I don't think the grandparent was unclear about this in his post though.