public IEnumerable <T> Intersect(IEnumerable <T> array)
{
var stackListQueue = new StackListQueue <T>();
var arrays = new StackListQueue <StackListQueue <T> >(this)
{
new StackListQueue <T>(array)
};
foreach (var arr in arrays.Where(arr => !IsSorted(arr)))
{
arr.Sort(Comparer);
}
List <int> indexes = arrays.Select((a, i) => 0).ToList();
List <int> counts = arrays.Select((a, i) => a.Count).ToList();
while (Enumerable.Range(0, 2).All(i => indexes[i] < counts[i]))
{
int value = Comparer.Compare(arrays[0][indexes[0]], arrays[1][indexes[1]]);
if (value == 0)
{
stackListQueue.Add(arrays[0][indexes[0]++]);
indexes[1]++;
}
else if (value < 0)
{
indexes[0]++;
}
else
{
indexes[1]++;
}
}
return(stackListQueue);
}
public new IEnumerable <T> Distinct()
{
var stackListQueue = new StackListQueue <T>();
if (Count == 0)
{
return(stackListQueue);
}
var arrays = new StackListQueue <StackListQueue <T> >(this);
foreach (var arr in arrays.Where(arr => !IsSorted(arr)))
{
arr.Sort(Comparer);
}
List <int> indexes = arrays.Select((a, i) => 0).ToList();
List <int> counts = arrays.Select((a, i) => a.Count).ToList();
while (Enumerable.Range(0, 1).All(i => indexes[i] < counts[i] - 1))
{
int value = Comparer.Compare(arrays[0][indexes[0]], arrays[0][indexes[0] + 1]);
if (value == 0)
{
indexes[0]++;
}
else
{
stackListQueue.Add(arrays[0][indexes[0]++]);
}
}
stackListQueue.Add(arrays[0][counts[0] - 1]);
return(stackListQueue);
}