private static string GetGetValueErrorMessage <TKey, TValue>(IEnumerable <KeyValuePair <TKey, TValue> > dictionary, TKey key)
{
const int lengthCap = 500;
var keysCharList = Alg.Intersperse(",", dictionary.Select(x => x.Key.ToString())).SelectMany(x => x.ToCharArray());
var errorMessage =
"Failed to find key " + key.ToString() + " in dictionary containing keys [" +
Alg.MergedChars(keysCharList.Take(lengthCap)) + (keysCharList.Skip(lengthCap).Any() ? " ...<truncated for length>" : "") + "]";
return(errorMessage);
}
public static IEnumerable <string> CharsToLines(IEnumerable <char> chars)
{
List <char> accumulator = new List <char>();
ReadPoint <char> currentChar = Alg.ReadPoint(chars);
while (!currentChar.AtEnd)
{
char c = currentChar.Value;
if (c == '\n')
{
yield return(Alg.MergedChars(accumulator));
accumulator = new List <char>();
}
else
if (c == '\r')
{ // have to handle '\r'-only case.
if (!currentChar.Next.AtEnd)
{
if (currentChar.Next.Value != '\n')
{
yield return(Alg.MergedChars(accumulator));
accumulator = new List <char>();
}
}
}
else
{
accumulator.Add(c);
}
currentChar = currentChar.Next;
}
if (accumulator.Count != 0)
{
yield return(Alg.MergedChars(accumulator));
accumulator = new List <char>();
}
}
public static IEnumerable <string> LineToCSFEntries(string line, char delimiter, bool quotesHaveMeaning)
{
ReadPoint <char> currentChar = Alg.ReadPoint(line.ToCharArray());
List <char> accumulatedElement = new List <char>();
bool inQuote = false;
bool haveSeenAComma = false;
while (!currentChar.AtEnd)
{
char c = currentChar.Value;
if (inQuote)
{
if (c == '\"')
{ // may be a double-quote
if (IsAtCSVQuote(currentChar))
{
accumulatedElement.Add('\"');
currentChar = currentChar.Next; // next add will be done at end of this loop.
}
else
{
accumulatedElement.Add(c);
inQuote = false;
}
}
else
{
accumulatedElement.Add(c);
}
}
else
{
if (c == delimiter)
{
haveSeenAComma = true;
yield return(Alg.MergedChars(accumulatedElement).Trim());
accumulatedElement = new List <char>();
}
else
{
if (quotesHaveMeaning && (c == '\"'))
{
inQuote = true;
accumulatedElement.Add(c);
}
else
{
accumulatedElement.Add(c);
}
}
}
currentChar = currentChar.Next;
}
if ((accumulatedElement.Count != 0) || haveSeenAComma)
{
yield return(Alg.MergedChars(accumulatedElement).Trim()); // deliberately return "last"
accumulatedElement = new List <char>();
}
}
public static string StringFromFile(IEnumerable <byte> fileContents)
{
return(Alg.MergedChars(BytesToChars(fileContents)));
}