/// <summary>
/// intersection of two sets.
/// </summary>
/// <param name="set"></param>
/// <returns></returns>
public EasySet <T> Intersection(EasySet <T> set)
{
return(new EasySet <T>(items.Intersect(set.items)));
//var result = new EasySet<T>();
//EasySet<T> big;
//EasySet<T> small;
//if (count > set.count)
//{
// big = this;
// small = set;
//}
//else
//{
// big = set;
// small = this;
//}
//foreach (var item1 in small.items)
//{
// foreach (var item2 in big.items)
// {
// if (item1.Equals(item2))
// {
// result.Add(item1);
// break;
// }
// }
//}
//return result;
}
/// <summary>
/// Difference of two sets.
/// </summary>
/// <param name="set"></param>
/// <returns></returns>
public EasySet <T> Difference(EasySet <T> set)
{
//return new EasySet<T>(items.Except(set.items));
var result = new EasySet <T>(items);
foreach (var item in set.items)
{
result.Remove(item);
}
return(result);
}
/// <summary>
/// Union of two sets.
/// </summary>
/// <param name="set"></param>
/// <returns></returns>
public EasySet <T> Union(EasySet <T> set)
{
return(new EasySet <T>(items.Union(set.items)));
//EasySet<T> result = new EasySet<T>();
//foreach (var item in items)
//{
// result.Add(item);
//}
//foreach (var item in set.items)
//{
// result.Add(item);
//}
//return result;
}
/// <summary>
/// Subset for two set.
/// </summary>
/// <param name="set"></param>
/// <returns></returns>
public bool Subset(EasySet <T> set)
{
return(items.All(i => set.items.Contains(i)));
//foreach (var item1 in items)
//{
// var equals = false;
// foreach (var item2 in set.items)
// {
// if(item1.Equals(item2))
// {
// equals = true;
// break;
// }
// }
// if(!equals)
// {
// return false;
// }
//}
//return true;
}
public EasySet <T> SymetricDifference(EasySet <T> set)
{
return(new EasySet <T>(items.Except(set.items).Union(set.items.Except(items))));
//var result = new EasySet<T>();
//foreach (var item1 in set.items)
//{
// var equals = false;
// foreach (var item2 in items)
// {
// if(item1.Equals(item2))
// {
// equals = true;
// break;
// }
// }
// if(!equals)
// {
// result.Add(item1);
// }
//}
//foreach (var item1 in items)
//{
// var equals = false;
// foreach (var item2 in set.items)
// {
// if (item1.Equals(item2))
// {
// equals = true;
// break;
// }
// }
// if (!equals)
// {
// result.Add(item1);
// }
//}
//return result;
}