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swannodette/gist:1499686

Created December 20, 2011 00:55
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example.clj
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gistfile1.clj
(defn make-cursor [x y]
{:x x :y y})
(defn left [cursor]
(update-in cursor [:x] #(- % 20))
(defn right [cursor]
(update-in cursor [:x] #(+ % 20))
(defn draw-cursor [g s {:keys [x y]}] (.drawString g s x y))
;; =====
;; usage
(def my-cursor (atom (make-cursor 0 0)))
(swap! my-cursor right)
(swap! my-cursor right)
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