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📜  C#|检查HashSet和指定的集合是否共享公共元素

📅  最后修改于: 2021-05-29 21:09:44             🧑  作者: Mango

HashSet是唯一元素的无序集合。在System.Collections.Generic命名空间中找到它。它用于我们要防止将重复项插入到集合中的情况。就性能而言,与列表相比更好。哈希集.Overlaps(IEnumerable ) 方法用于检查当前HashSet是否对象和指定的集合共享公共元素。

句法:

mySet1.Overlaps(mySet2);

其中,mySet1和mySet2是HashSets。

返回类型:如果两个HashSet共享至少一个公共元素,则此方法返回true ,否则返回false

下面给出了一些示例,以更好地理解实现:

范例1:

// C# code to Check if a HashSet and a
// specified collection share common elements
using System;
using System.Collections.Generic;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Creating a HashSet of strings
        HashSet mySet1 = new HashSet();
  
        // Inserting elements in HashSet
        mySet1.Add("Geeks");
        mySet1.Add("GeeksforGeeks");
        mySet1.Add("GeeksClasses");
        mySet1.Add("GeeksQuiz");
  
        // Creating a HashSet of strings
        HashSet mySet2 = new HashSet();
  
        // Inserting elements in HashSet
        mySet2.Add("DS");
        mySet2.Add("C++");
        mySet2.Add("Java");
        mySet2.Add("JavaScript");
  
        // Check if a HashSet and a specified
        // collection share common elements
        Console.WriteLine(mySet1.Overlaps(mySet2));
    }
}
输出:
False

范例2:

// C# code to Check if a HashSet and a
// specified collection share common elements
using System;
using System.Collections.Generic;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Creating a HashSet of integers
        HashSet mySet1 = new HashSet();
  
        // Inserting elements in HashSet
        mySet1.Add(4);
        mySet1.Add(8);
        mySet1.Add(12);
        mySet1.Add(16);
  
        // Creating a HashSet of integers
        HashSet mySet2 = new HashSet();
  
        // Inserting elements in HashSet
        mySet2.Add(4);
        mySet2.Add(8);
        mySet2.Add(15);
        mySet2.Add(20);
  
        // Check if a HashSet and a specified
        // collection share common elements
        Console.WriteLine(mySet1.Overlaps(mySet2));
    }
}
输出:
True

参考:

  • https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.generic.hashset-1.overlaps?view=netframework-4.7.2