//----------------------------- Static Methods ---------------------------------
// Functional Intersect
public static GSet <T> /*!*/ Intersect(GSet <T> /*!*/ a, GSet <T> /*!*/ b)
{
Contract.Requires(b != null);
Contract.Requires(a != null);
Contract.Ensures(Contract.Result <GSet <T> >() != null);
//Contract.Ensures(Contract.ForAll(result, x => a[x] && b[x] ));
GSet <T> /*!*/ res = (GSet <T> /*!*/)cce.NonNull(a.Clone());
res.Intersect(b);
return(res);
}
// Functional Union
public static GSet <T> /*!*/ Union(GSet <T> /*!*/ a, GSet <T> /*!*/ b)
{
Contract.Requires(a != null);
Contract.Requires(b != null);
Contract.Ensures(Contract.Result <GSet <T> >() != null);
// Contract.Ensures(Contract.ForAll(result, x => a[x] || b[x] ));
GSet <T> /*!*/ res = (GSet <T> /*!*/)cce.NonNull(a.Clone());
res.AddRange(b);
return(res);
}
public static GSet <T> /*!*/ Filter(GSet <T> /*!*/ a, Func <T, bool> filter)
{
Contract.Requires(filter != null);
Contract.Requires(a != null);
Contract.Ensures(Contract.Result <GSet <T> >() != null);
GSet <T> inter = new GSet <T>();
foreach (T elem in a)
{
Contract.Assert(elem != null);
if (filter(elem))
{
inter.Add(elem);
}
}
return(inter);
}
public void Intersect(GSet <T> /*!*/ s)
{
Contract.Requires(s != null);
if (s == this)
{
return;
}
ht.Clear();
var newArr = new List <T>();
foreach (T key in arr)
{
if (s.ht.ContainsKey(key))
{
ht[key] = newArr.Count;
newArr.Add(key);
}
}
arr = newArr;
}
