Getting Clojure

In the Wild

Examples of destructuring are easy to find if you look around in the Clojure ecosystem. For example, Korma,^[21] the database library, contains this function, which helps set up connections to MySQL databases:

(defn mysql
"Create a database specification for a
 mysql database. Opts should include
 keys for :db, :user, and :password.
 You can also optionally set host and port.
 Delimiters are automatically set to \"`\"."
  [{:keys [host port db make-pool?]
    :or {host "localhost", port 3306, db "", make-pool? true}
    :as opts}]

    ;; Do something with host, port, db, make-pool? and opts
)

Again we have the typical function with a docstring setup, but this function is using some interesting destructuring to ...