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Showing content from https://github.com/clojure-emacs/clj-refactor.el/wiki/cljr-promote-function below:

cljr promote function · clojure-emacs/clj-refactor.el Wiki · GitHub

Given this:

(map #(-> % (str "!") symbol) '[aww yeah])

And I place my cursor on symbol and do cljr-promote-function and rename % to sym:

 (map (fn [sym] (-> sym (str "!") symbol)) '[aww yeah])

With a prefix it will promote the function literal all the way to a defn.

Given this:

 (map (fn [sym] (-> sym (str "!") symbol)) '[aww yeah])

And I place my cursor on symbol and do cljr-promote-function and call the fn shout-it!

(defn shout-it!
  [sym]
  (-> sym (str "!") symbol))

(map shout-it! '[aww yeah])

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