Ivan Lazar Miljenovic <ivan.miljenovic at gmail.com> writes: > That's because you still have "Just a" values. Try mapMaybe from Data.Maybe > instead. Sounds like a job for catMaybes from Data.Maybe catMaybes [Nothing, Just "foo"] ==> ["foo"] -- Jón Fairbairn Jon.Fairbairn at cl.cam.ac.uk