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並前往https://nelsonmorris.net/2015/05/18/reloaded-protocol-and-no-implementation-of-method.html

Reloaded a protocol and "No implementation of method"?

(ns z.draw (:require [clojure.string :as str])) (defprotocol Drawable (draw [t])) (defn draw-many [shapes] (str/join "\n" (map draw shapes))).

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