public void IntersectWith(IEnumerable <T> other)
{
TSetBase <T> otherAsSet = other as TSetBase <T>;
if (otherAsSet != null)
{
if (otherAsSet.Count == 0)
{
Clear();
return;
}
int maxIndex = SetHelper.GetMaxIndex();
for (int i = maxIndex - 1; i >= 0; --i)
{
if (SetHelper.IsValidIndex(i))
{
T item = Get(i);
if (!otherAsSet.Contains(item))
{
RemoveAtInternal(i);
}
}
}
}
else
{
// HashSet to avoid duplicates
HashSet <T> set = new HashSet <T>(other);
if (set.Count == 0)
{
Clear();
return;
}
int maxIndex = SetHelper.GetMaxIndex();
for (int i = maxIndex - 1; i >= 0; --i)
{
if (SetHelper.IsValidIndex(i))
{
T item = Get(i);
if (!set.Contains(item))
{
RemoveAtInternal(i);
}
}
}
}
}
public bool IsProperSubsetOf(IEnumerable <T> other)
{
TSetBase <T> otherAsSet = other as TSetBase <T>;
if (otherAsSet != null)
{
if (Count == 0)
{
return(otherAsSet.Count > 0);
}
if (Count >= otherAsSet.Count)
{
return(false);
}
foreach (T item in this)
{
if (!otherAsSet.Contains(item))
{
return(false);
}
}
return(true);
}
else
{
// HashSet to avoid duplicates
HashSet <T> set = new HashSet <T>(other);
if (Count == 0)
{
return(set.Count > 0);
}
if (Count >= set.Count)
{
return(false);
}
foreach (T item in this)
{
if (!set.Contains(item))
{
return(false);
}
}
return(true);
}
}