Question

I have the following working code to convert a list with nested maps (actually tweet data) to a map:

(defn filter
  "This function returns a map with the user as key, #followers as value"
  [raw-tweets]

  (let [users (map :user raw-tweets)
        names (map :name users)
        followers (map :followers_count users)]
    (zipmap names followers)))

Although this works as expected, I was wondering if there would be a more idiomatic way to do this in Clojure. Any alternatives?

Answer 1

What you have is fine, though you can build the map as you go by using reduce:

(defn user-followers [raw-tweets]
  (reduce #(assoc %1 (:name %2) (:followers_count %2))
    {} (map :user raw-tweets)))