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15
Task/Letter-frequency/ArkScript/letter-frequency.ark
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15
Task/Letter-frequency/ArkScript/letter-frequency.ark
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(import std.String :toLower :find :asciiLowercase)
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(import std.List)
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(import std.Dict)
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(import std.IO)
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(let countLetters (fun (s) {
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(let counts (dict))
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(list:forEach s
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(fun (c) {
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(set c (toLower c))
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(if (!= -1 (find asciiLowercase c))
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(dict:add counts c (if (nil? (dict:get counts c)) 1 (+ 1 (dict:get counts c))))) }))
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counts }))
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(print (countLetters (io:readFile "f.txt")))
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