/// <summary>
/// Returns set of items of first set without items of second set
/// </summary>
/// <param name="set1"></param>
/// <param name="set2"></param>
/// <returns></returns>
/// <exception cref="ArgumentNullException"></exception>
public static CustomSet <T> Except(CustomSet <T> set1, CustomSet <T> set2)
{
if (set1 == null || set2 == null)
{
throw new ArgumentNullException();
}
CustomSet <T> result = new CustomSet <T>(set1);
for (int i = 0; i < set2.Count; i++)
{
result.Remove(set2.Collection[i]);
}
return(result);
}
/// <summary>
/// Returns set of items each set contains
/// </summary>
/// <param name="set1"></param>
/// <param name="set2"></param>
/// <returns></returns>
/// <exception cref="ArgumentNullException"></exception>
public static CustomSet <T> Intersect(CustomSet <T> set1, CustomSet <T> set2)
{
if (set1 == null || set2 == null)
{
throw new ArgumentNullException();
}
CustomSet <T> result = new CustomSet <T>();
for (int i = 0; i < set1.Count; i++)
{
if (set1.Collection.Contains(set2.Collection[i]))
{
result.Add(set2.Collection[i]);
}
}
return(result);
}
bool IEquatable <CustomSet <T> > .Equals(CustomSet <T> other)
{
if (other == null)
{
return(false);
}
if (ReferenceEquals(this, other))
{
return(true);
}
if (Count != other.Count)
{
return(false);
}
return(!other.Where((t, i) => !Collection.Contains(other.Collection[i])).Any());
//for (int i = 0; i < other.Count; i++)
// if (!Collection.Contains(other.Collection[i]))
// return false;
//return true;
}
/// <summary>
/// Creates set from another set
/// </summary>
/// <param name="set"></param>
public CustomSet(CustomSet <T> set)
{
Collection = new CustomCollection <T>(set.Collection);
}