public LiteSet <T> Intersection(LiteSet <T> set)
{
var result = new LiteSet <T>();
LiteSet <T> big;
LiteSet <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);
}
public LiteSet <T> Difference(LiteSet <T> set)
{
var result = new LiteSet <T>(items);
foreach (var item in set.items)
{
result.Remove(item);
}
return(result);
}
public LiteSet <T> Union(LiteSet <T> set)
{
LiteSet <T> result = new LiteSet <T>();
foreach (var item in items)
{
result.Add(item);
}
foreach (var item in set.items)
{
result.Add(item);
}
return(result);
}
public LiteSet <T> SymmetricDifference(LiteSet <T> set)
{
var result = new LiteSet <T>();
foreach (var item1 in items)
{
var equals = false;
foreach (var item2 in set.items)
{
if (item1.Equals(item2))
{
equals = true;
break;
}
}
if (equals == false)
{
result.Add(item1);
}
}
foreach (var item1 in set.items)
{
var equals = false;
foreach (var item2 in items)
{
if (item1.Equals(item2))
{
equals = true;
break;
}
}
if (equals == false)
{
result.Add(item1);
}
}
return(result);
}
public bool Subset(LiteSet <T> set)
{
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);
}