Apply itself is lazy. This: (apply f infinite-lazy-list) does not force evaluation of the infinite-lazy-list, if the f itself does not force it. My favorite exa

Apply itself is lazy. This: (apply f infinite-lazy-list) does not force evaluation of the infinite-lazy-list, if the f itself does not force it. My favorite example is (apply concat ...), which can be used to flatten an infinite sequence of sequences (concat is lazy wrt to its argument list, so this works.)