Clojurians Log v2

I am looking for the dual of setval and NONE usage. I have

(setval [MAP-VALS #(not (< 0 %))] NONE {:a 1 :b -1 :c 3})

This is a nicer way to write that: (setval [MAP-VALS (pred< 0)] NONE {:a 1 :b -1 :c 3})