public LetterTracker()
{
orderedLetters = new OrderedLetter[LETTER_COUNT];
for (var i = 0; i < LETTER_COUNT; ++i)
{
orderedLetters[i] = new OrderedLetter();
}
}
public static List <int> PrintFirstNRE(StreamReader sr)
{
if (sr == null)
{
throw new ArgumentNullException("Parameter StreamReader sr is null.");
}
//// Debug to see what we got in that thar stream
//while (sr.EndOfStream == false)
//{
// Console.WriteLine(Convert.ToChar(sr.Read()));
//}
var letterTracker = new OrderedLetter[LETTER_COUNT];
for (var i = 0; i < LETTER_COUNT; ++i)
{
letterTracker[i] = new OrderedLetter();
}
//var letters = new LetterTracker();
// "cannot assign to letter because it is a foreach iteration variable"
//foreach (var letter in letters)
//{
// letter = new orderedletter();
//}
var firstNREList = new List <int>();
// No. If stream is empty this will fail:
//var currFirstNRE = sr.Read();
// Either use a single Read() inside the end check of the while loop
// Or add protection out here
// (Fixed with the former)
//ValidateLetter(currFirstNRE);
//letters.SeeLetter(currFirstNRE);
//firstNREList.Add(currFirstNRE);
while (sr.EndOfStream == false)
{
var currLetter = sr.Read();
Console.WriteLine($"Reading '{Convert.ToChar(currLetter)}' from stream.");
ValidateLetter(currLetter);
letterTracker[currLetter - 'a'].LogAsRead();
var currFirstNRE = FindCurrentFirstNRE(letterTracker);
firstNREList.Add(currFirstNRE);
if (currFirstNRE == NO_NRE)
{
Console.WriteLine($"No non-repeating letters. {NO_NRE}");
}
else
{
Console.WriteLine($"First non-repeating letter so far is: {Convert.ToChar(currFirstNRE)}");
}
}
// Fixup for if there were no letters in the stream at all
if (firstNREList.Count == 0)
{
Console.WriteLine(
$"No letters found in stream.\n" +
$"No non-repeating letters. {NO_NRE}");
firstNREList.Add(NO_NRE);
}
return(firstNREList);
}
