chickadee » transducers » flatten-list

A transducer that flattens any and all lists (recursively) that it encounters.

 
(import transducers)

(transduce list-fold
           flatten-list
           (collect-list)
           (list (list 1 2 (list 3 4 5))
                 (list 6
                       (list 7 8 9)
                       (list 10 11))))

; => (1 2 3 4 5 6 7 9 10 11)