@nathanmarz

(setval [MAP-VALS (comp not :a)] NONE data)

(setval [MAP-VALS (selected? :a (complement identity))] NONE data)

@tolitius same thing

would selected? be more performant?

definitely not

the comp approach might be slightly more performant

pretty minor though

thanks. trying to reason when to use an fn vs. a navigator

in this case it doesn't really matter