如何從地圖地圖中的每個值中提取值？

Question

我剛開始學習Clojure的，如果我定義如下圖：

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

我怎麼會寫(defn get-titles [] ...)，將返回 ("Normal", "Beta", "Gamma")的功能？

Answer 1

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

Answer 2

或者：(for [[k v] distr] (:title v))