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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
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7
Task/Roman-numerals-Encode/Clojure/roman-numerals-encode-1.clj Normal file
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(def arabic->roman
(partial clojure.pprint/cl-format nil "~@R"))
(arabic->roman 147)
;"CXXIII"
(arabic->roman 99)
;"XCIX"

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Task/Roman-numerals-Encode/Clojure/roman-numerals-encode-2.clj Normal file
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(def roman-map
(sorted-map
1 "I", 4 "IV", 5 "V", 9 "IX",
10 "X", 40 "XL", 50 "L", 90 "XC",
100 "C", 400 "CD", 500 "D", 900 "CM"
1000 "M"))
(defn int->roman [n]
{:pre (integer? n)}
(loop [res (StringBuilder.), n n]
(if-let [v (roman-map n)]
(str (.append res v))
(let [[k v] (->> roman-map keys (filter #(> n %)) last (find roman-map))]
(recur (.append res v) (- n k))))))
(int->roman 1999)
; "MCMXCIX"

16
Task/Roman-numerals-Encode/Clojure/roman-numerals-encode-3.clj Normal file
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(defn a2r [a]
(let [rv '(1000 500 100 50 10 5 1)
rm (zipmap rv "MDCLXVI")
dv (->> rv (take-nth 2) next #(interleave % %))]
(loop [a a rv rv dv dv r nil]
(if (<= a 0)
r
(let [v (first rv)
d (or (first dv) 0)
l (- v d)]
(cond
(= a v) (str r (rm v))
(= a l) (str r (rm d) (rm v))
(and (> a v) (> a l)) (recur (- a v) rv dv (str r (rm v)))
(and (< a v) (< a l)) (recur a (rest rv) (rest dv) r)
:else (recur (- a l) (rest rv) (rest dv) (str r (rm d) (rm v)))))))))

5
Task/Roman-numerals-Encode/Clojure/roman-numerals-encode-4.clj Normal file
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(a2r 1666)
"MDCLXVI"
(map a2r [1000 1 389 45])
("M" "I" "CCCLXXXIX" "XLV")

20
Task/Roman-numerals-Encode/Clojure/roman-numerals-encode-5.clj Normal file
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(def roman-map
(sorted-map-by >
1 "I", 4 "IV", 5 "V", 9 "IX",
10 "X", 40 "XL", 50 "L", 90 "XC",
100 "C", 400 "CD", 500 "D", 900 "CM"
1000 "M"))
(defn a2r
([r]
(reduce str (a2r r (keys roman-map))))
([r n]
(when-not (empty? n)
(let [e (first n)
v (- r e)
roman (roman-map e)]
(cond
(< v 0) (a2r r (rest n))
(= v 0) (cons roman [])
(>= v e) (cons roman (a2r v n))
(< v e) (cons roman (a2r v (rest n))))))))

5
Task/Roman-numerals-Encode/Clojure/roman-numerals-encode-6.clj Normal file
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(a2r 1666)
"MDCLXVI"
(map a2r [1000 1 389 45])
("M" "I" "CCCLXXXIX" "XLV")