Add the function to make a frequency string from a map.

src/cipher_analytical_machine/symbols/frequencies.clj

@@ -0,0 +1,79 @@
+(ns cipher-analytical-machine.symbols.frequencies
+  (:gen-class))
+
+(defn map-to-string
+  "Convert the map of frequencies to the frequency string. Letters are sorted by frequency in descending order."
+  [frequency-map]
+  (->> frequency-map
+       (reduce (fn [acc el] (conj acc el)) [])
+       (sort-by last)
+       (map first)
+       (reverse)
+       (apply str)))
+
+(def english-letter-frequencies {
+   \a 0.0804
+   \b 0.0154
+   \c 0.0306
+   \d 0.0399
+   \e 0.1251
+   \f 0.0230
+   \g 0.0196
+   \h 0.0549
+   \i 0.0726
+   \j 0.0016
+   \k 0.0067
+   \l 0.0414
+   \m 0.0253
+   \n 0.0709
+   \o 0.0760
+   \p 0.0200
+   \q 0.0011
+   \r 0.0612
+   \s 0.0654
+   \t 0.0925
+   \u 0.0271
+   \v 0.0099
+   \w 0.0192
+   \x 0.0019
+   \y 0.0173
+   \z 0.0009
+})
+
+(def ukrainian-letter-frequencies {
+   \а 0.064
+   \б 0.013
+   \в 0.046
+   \г 0.013
+   \ґ 0.0001
+   \д 0.027
+   \е 0.042
+   \є 0.005
+   \ж 0.007
+   \з 0.020
+   \и 0.055
+   \і 0.044
+   \ї 0.010
+   \й 0.009
+   \к 0.033
+   \л 0.027
+   \м 0.029
+   \н 0.068
+   \о 0.086
+   \п 0.025
+   \р 0.043
+   \с 0.037
+   \т 0.045
+   \у 0.027
+   \ф 0.003
+   \х 0.011
+   \ц 0.010
+   \ч 0.011
+   \ш 0.005
+   \щ 0.004
+   \ь 0.016
+   \ю 0.008
+   \я 0.019
+   \  0.138
+})
+