The value of 'maps' can be, for example; [{:lat 1 :lng 4} {:lat 2 :lng 3}].
If you enter (min [{:lat 1 :lng 4} {:lat 2 :lng 3}]) in the repl the result
will be {:lat 1 :lng 3}
If you replace 'min' by its definition you get;
(min [{:lat 1 :lng 4} {:lat 2 :lng 3}])
=>
(zipmap [:lat :lng]
(map (fn [k] (apply clojure.core/min
(map k [{:lat 1 :lng 4} {:lat 2 :lng
3}])))
[:lat :lng]))
I hope this helps. Succes!
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