Thanks, probably I am requiring the wrong namespace, because I am getting:
Type Error (myproject.protocols:4:1) Found untyped var: cljs.core.typed/defprotocol
in: cljs.core.typed/defprotocol
Would it be possible to help me with an example?
(fmap #(apply str "A" %&) "b" "c" "d") => "Abcd"