如何从地图中的每个值中提取值？

Question

如果我定义了以下地图，我刚开始学习Clojure：

(def distributions {:normal {:title "Normal" :mean 0 :sd 1}
                    :beta   {:title "Beta" :a 1 :b 3}
                    :gamma  {:title "Gamma" :rate 1/2 :shape 1}})

我如何写(defn get-titles [] ...)一个会返回的函数 ("Normal", "Beta", "Gamma")？

Answer 1

(defn get-titles [] (map :title (vals distributions)))

Answer 2

或者：(for [[k v] distr] (:title v))