Type conversion and generating big Fibonacci numbers in Clojure

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Notes

;; bigger_fibonacci.clj

(def fib (memoize
          (fn [index]
            (case index
              1 0
              2 1
              (+
               (bigint (fib (dec index)))
               (bigint (fib (- index 2))))))))

;; memonize_fib_right_way.clj

(def fib (memoize
          (fn [index]
            (case index
              1 0
              2 1
              (+
               (fib (dec index))
               (fib (- index 2)))))))
(fib 52)