gistfile1.clj

;Source map: 
  {
    "key1" {name: "some1" dependencies: ["dep1" "dep2" "dep3"]}
    "key2" {name: "some2" dependencies: ["dep4" "dep3"]}
    ;and so on
  }
  
; I want to get to this     
  {
    "key1" {name: "some1" dependencies: ["mapped dep1" "mapped dep2" "mapped dep3"]}
    "key2" {name: "some2" dependencies: ["mapped dep4" "mapped dep3"]}
    ;and so on
  }
; So basically, map the dependencies array from every value in the source map

(def src {
    "key1" {:name "some1" :dependencies ["dep1" "dep2" "dep3"]}
    "key2" {:name "some2" :dependencies ["dep4" "dep3"]}
    ;and so on
  })

(defn mapper [s]
        (str "mapped " s))

(into {}
        (map (fn [[k v]] 
                   (vector k (update-in v [:dependencies ] #(into [] (map mapper %))))) src))