public string GetRepeatedLetters(RepetitionCode repetitionCode)
{
var sb = new StringBuilder();
var length = sequence[0].Length;
for (int i = 0; i < length; i++)
{
var repeatedLetter = sequence
.Select(c => c[i])
.GroupBy(c => c)
.LetterOrder(repetitionCode)
.Select(c => c.Key)
.First()
.ToString();
sb.Append(repeatedLetter);
}
return(sb.ToString());
}
public static IOrderedEnumerable <IGrouping <char, char> > LetterOrder(this IEnumerable <IGrouping <char, char> > grouping, RepetitionCode repetitionCode)
{
IOrderedEnumerable <IGrouping <char, char> > orderedLetters = null;
switch (repetitionCode)
{
case RepetitionCode.MostFrequent:
orderedLetters = grouping.OrderByDescending(c => c.Count());
break;
case RepetitionCode.LeastFrequent:
orderedLetters = grouping.OrderBy(c => c.Count());
break;
}
return(orderedLetters);
}
