There's an unofficial companion that has the examples translated to Javascript: http://interglacial.com/hoj/hoj.html http://interglacial.com/hoj/hoj.html Same

There's an unofficial companion that has the examples translated to Javascript: http://interglacial.com/hoj/hoj.html http://interglacial.com/hoj/hoj.html Same for Ruby: http://graysoftinc.com/higher-order-ruby http://graysoftinc.com/higher-order-ruby