public MultiSet <T> ExceptWith(IEnumerable <T> other)
{
if (other is null)
{
throw new ArgumentNullException();
}
ThrowExceptionIfReadOnly();
var multiset = new MultiSet <T>(other);
var enumerator = multiset.GetEnumerator();
while (enumerator.MoveNext())
{
Remove(enumerator.Current, multiset[enumerator.Current]);
}
return(this);
}
public bool IsSupersetOf(IEnumerable <T> other)
{
if (other is null)
{
throw new ArgumentNullException();
}
var multiset = new MultiSet <T>(other);
var enumerator = multiset.GetEnumerator();
while (enumerator.MoveNext())
{
if (!Contains(enumerator.Current) || multiset[enumerator.Current] > this[enumerator.Current])
{
return(false);
}
}
return(true);
}