I am looking for a book or lecture notes that doesn't just describe the theory of Lagrangian and Hamiltonian mechanics, but places strong emphasis on dealing with these topics computationally. Any computational physics book or lecture notes that I come across seems to be either a very basic introduction to standard numerical methods, or else focuses on very elementary physics.
So does anyone know any resource that may be of use? I would not normally ask for a resource recommendation on stackexchange sites but I have had no luck after lots of searching the net.