///////////////////////////////////////////////////////////////////////
public static StringSortedList GetRange(
IList list,
int firstIndex,
int lastIndex
)
{
StringSortedList range = null;
if (list != null)
{
range = new StringSortedList();
for (int index = firstIndex; index <= lastIndex; index++)
{
if (list[index] == null)
{
continue;
}
range.Add(list[index].ToString(), null);
}
}
return(range);
}
///////////////////////////////////////////////////////////////////////
public static Result ListOptions(
OptionDictionary options,
bool safe
)
{
if (options == null)
{
return("there are no available options");
}
IDictionary <string, string> dictionary;
if (safe)
{
dictionary = new StringSortedList();
foreach (KeyValuePair <string, IOption> pair in options)
{
IOption option = pair.Value;
if ((option == null) || option.IsUnsafe(options))
{
continue;
}
string name = pair.Key;
if (name == null)
{
continue;
}
dictionary.Add(name, null);
}
}
else
{
dictionary = new StringSortedList(options.Keys);
}
return(String.Format(
"available options are {0}", ToEnglish(dictionary)));
}
