chickadee » transducers » chunks-exact

chunks collects groups of up to n items given a collector and forwards these chunked representations on as individual items. If enough items are not available then chunks will return the chunk early.

 
(import transducers)

(transduce list-fold
           (chunks 3 (collect-list))
           (collect-list)
           (list 0 1 2 3 4 5 6 8 9 10))

; => ((0 1 2) (3 4 5) (6 7 8) (9 10))

Notice how that last group is (9 10) even though we asked for chunks of size 3. chunks-exact works similarly to chunks, but drops any groups that do not have exactly size n.

 
(import transducers)

(transduce list-fold
           (chunks 3 (collect-list))
           (collect-list)
           (list 0 1 2 3 4 5 6 8 9 10))

; => ((0 1 2) (3 4 5) (6 7 8))