private static List <List <string> > Intersect(List <List <string> > a, List <List <string> > b)
{
if (IsAny(a))
{
return(b);
}
if (IsAny(b))
{
return(a);
}
var cmp = new LXComporer();
var ret = new List <List <string> >();
foreach (List <string> k in a)
{
foreach (List <string> l in b)
{
var inter = new List <string>();
foreach (string x in l)
{
if (k.BinarySearch(x) < 0)
{
inter.Add(x);
}
}
inter.AddRange(k);
inter.Sort();
if (ret.BinarySearch(inter, cmp) < 0)
{
ret.Add(inter);
}
}
}
ret.Sort(cmp);
return(ret);
}
private static List <List <string> > Cumulate(List <List <string> > a, List <List <string> > b)
{
if (IsAny(a))
{
return(a);
}
if (IsAny(b))
{
return(b);
}
var cmp = new LXComporer();
var ret = new List <List <string> >();
foreach (List <string> l in b)
{
if (a.BinarySearch(l, cmp) < 0)
{
ret.Add(l);
}
}
ret.AddRange(a);
ret.Sort(cmp);
return(ret);
}