> However, if you would want to do something like an evolvable trade-off
> between epitopes and mutations in viruses, you would like to be able
> to store the functions inside each virus.
And you can do that if you change how you retrieve values.
(defn get-fn
"Like `get`, but handles returned functions by
calling them with the map itself."
[m k]
(let [x (get m k)]
(if (fn? x)
(x m)
x)))
(def my-map {:a 1 :b 2 :c #(+ (:a %) (:b %))})
(get-fn my-map :a)
=> 1
(get-fn my-map :c)
=> 3
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