(map (defn f [c] {:overlap-amount (circle-overlap-distance circle c) :mid-point (mid-point circle c)}) circle-

(map (defn f [c] {:overlap-amount (circle-overlap-distance circle c) :mid-point (mid-point circle c)}) circle-list) Is there a reason this uses defn instead of fn? This is the first time I've seen defn used like this. Since this expands to something like (def f (fn [c] ... and f is never used anywhere, I'd change it to fn. If f is used, I'd consider letfn instead. The revised code replaces it with #(...) which is shorthand for (fn [...] ...), but am curious if there was a reason for using defn or if it was just an oversight.