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benkamphaus/narcissist.clj

Created November 17, 2016 15:18
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Find narcissistic numbers in Clojure (non-optimized)
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narcissist.clj
(defn narcissistic?
"Returns true if n with m digits is equal to each digit in n to the
m exponent."
[n]
(let [digits (map #(Character/digit % 10) (str n))
n-digits (count digits)
exps (map #(Math/pow % n-digits) digits)]
(== n (apply + exps))))
(take 10 (filter narcissistic? (iterate inc 10)))
;; (153 370 371 407 1634 8208 9474 54748 92727 93084)
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