public void StringifyLeastFrequent_BuildsString_BasedOnFrequencies_InColumns()
{
var expected = "advent";
var actual = LetterFrequency.StringifyLeastFrequent(() => TestCase.Data);
Assert.Equal(expected, actual);
}
public async Task <string> Handle(CalcFrequencyCommand request, CancellationToken cancellationToken)
{
var posts = await _postService.GetLastPostInfoAsync(request.UserName, COUNT_POST);
var resultFrequency = new LetterFrequency().Calc(posts.Select(p => p.Text));
var result = FormatterFactory.GetFormatter().PrepareString(resultFrequency.allLetter, resultFrequency.letterCounter);
var statisticMessage = $"{request.UserName}, статистика для последних {COUNT_POST} постов: {result}";
await _postService.CreatePostAsync(statisticMessage, request.UserName);
return(result);
}
public static string Solve(string CipherText, Mode mode = Mode.Alphabet)
{
int bestKey = 0;
double bestScore = -1;
Language language = Language.English;
LetterFrequency frequency = LetterFrequency.GenerateFrequency(CipherText);
for (int keyAttempt = 0; keyAttempt < (mode == Mode.Alphabet ? 26 : 256); keyAttempt++)
{
LetterFrequency tempFrequency = frequency.Shift(-keyAttempt, mode != Mode.Alphabet);
double tempScore = -1;
double tempID = -1;
if (mode == Mode.CharacterUTF8)
{
for (int ID = 0; ID < LetterFrequency.AllLanguages.Length; ID++)
{
double langScore = tempFrequency.Compare(LetterFrequency.AllLanguages[ID]);
if (langScore > tempScore)
{
tempScore = langScore;
tempID = ID;
}
}
}
else
{
for (int ID = 0; ID < LetterFrequency.AlphaLanguages.Length; ID++)
{
double langScore = tempFrequency.Compare(LetterFrequency.AlphaLanguages[ID]);
if (langScore > tempScore)
{
tempScore = langScore;
tempID = ID;
}
}
}
if (tempScore > bestScore)
{
bestScore = tempScore;
language = (Language)tempID;
bestKey = keyAttempt;
}
}
string output = "The best language of choice was: " + language.ToString() + "\n";
output += "The best key of choice was " + bestKey + " with a score of " + bestScore + "\nDecoded message is:\n";
output += Decrypt(CipherText, bestKey, mode);
return(output);
}
public static void Problem6()
{
var s = LetterFrequency.StringifyLeastFrequent(() => FileStringReader.Read("P6.txt"));
Console.WriteLine("Frequented string = {0}", s);
}
