It seems that there are seven undocumented jQuery methods:

init()

pushStack()

push()

sort()

splice()

extend()

domManip()

I am not talking about members of the jQuery object as in $.member, but about members of the object returned by the jQuery factory function as in $("div").member.

I don't have the motivation to figure out how exactly these methods work, but a quick Google search didn't return much info...

I'd be happy to find out more about these methods...