要检查HashSet是否是指定集合的超集,代码如下-
using System; using System.Collections.Generic; public class Demo { public static void Main(){ HashSet<string> set1 = new HashSet<string>(); set1.Add("AB"); set1.Add("CD"); set1.Add("EF"); set1.Add("AB"); set1.Add("IJ"); set1.Add("KL"); set1.Add("EF"); set1.Add("OP"); Console.WriteLine("Elements in HashSet1"); foreach(string val in set1){ Console.WriteLine(val); } HashSet<string> set2 = new HashSet<string>(); set2.Add("EF"); set2.Add("KL"); Console.WriteLine("Elements in HashSet2"); foreach(string val in set2){ Console.WriteLine(val); } Console.WriteLine("Is set1 a superset of set2? "+set1.IsSupersetOf(set2)); } }
输出结果
这将产生以下输出:
Elements in HashSet1 AB CD EF IJ KL OP Elements in HashSet2 EF KL Is set1 a superset of set2? True
让我们看另一个例子-
using System; using System.Collections.Generic; public class Demo { public static void Main(){ HashSet<string> set1 = new HashSet<string>(); set1.Add("IJ"); set1.Add("KL"); set1.Add("EF"); set1.Add("OP"); Console.WriteLine("Elements in HashSet1"); foreach(string val in set1){ Console.WriteLine(val); } HashSet<string> set2 = new HashSet<string>(); set2.Add("KL"); set2.Add("MN"); set2.Add("OP"); set2.Add("QR"); Console.WriteLine("Elements in HashSet2"); foreach(string val in set2){ Console.WriteLine(val); } Console.WriteLine("Is set1 a superset of set2? "+set1.IsSupersetOf(set2)); } }
输出结果
这将产生以下输出-
Elements in HashSet1 IJ KL EF OP Elements in HashSet2 KL MN OP QR Is set1 a superset of set2? False