What real purpose does $.noop() serve in jQuery 1.4?

Question

Pouring over the release notes regarding jQuery 1.4, I came acrosss $.noop() which is:

Description: An empty function. (added in 1.4)

Answer 1

I use a couple of plugins which require callbacks, but for some parts I don't actually want to use a certain callback. So, I put in function() {}.

noop is defined in the jQuery source as

noop: function() {}

so it will fit anywhere you'd use a blank function, such as the above example.