user=> (remove pos? [1 -2 2 -1 3 7 0]) (-2 -1 0) user=> (remove #(zero? (mod % 3)) (range 1 21)) (1 2 4 5 7 8 10 11 13 14 16 17 19 20)
user=> (remove pos? [1 -2 2 -1 3 7 0]) (-2 -1 0) user=> (remove #(zero? (mod % 3)) (range 1 21)) (1 2 4 5 7 8 10 11 13 14 16 17 19 20)
user=> (remove pos? [1 -2 2 -1 3 7 0]) (-2 -1 0) user=> (remove #(zero? (mod % 3)) (range 1 21)) (1 2 4 5 7 8 10 11 13 14 16 17 19 20)