> maps, filters and reduces Don't forget unfold! http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.42.1735 http://citeseerx.ist.psu.edu/viewdoc/summary?d

> maps, filters and reduces Don't forget unfold! http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.42.1735 http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.42.1...