检查HashSet是否包含C#中的指定元素
要检查HashSet是否包含指定的元素,代码如下-
示例
using System;using System.Collections.Generic;
public class Demo {
public static void Main(){
HashSet<int> set1 = new HashSet<int>();
set1.Add(25);
set1.Add(50);
set1.Add(75);
set1.Add(100);
set1.Add(125);
set1.Add(150);
Console.WriteLine("Elements in HashSet1");
foreach(int val in set1){
Console.WriteLine(val);
}
HashSet<int> set2 = new HashSet<int>();
set2.Add(30);
set2.Add(60);
set2.Add(100);
set2.Add(150);
set2.Add(200);
set2.Add(250);
Console.WriteLine("Elements in HashSet2");
foreach(int val in set2){
Console.WriteLine(val);
}
Console.WriteLine("Do they share common elements? "+set1.Overlaps(set2));
Console.WriteLine("Does HashSet1 has element 60? "+set1.Contains(60));
Console.WriteLine("Does HashSet2 has element 60? "+set2.Contains(60));
}
}
输出结果
这将产生以下输出-
Elements in HashSet125
50
75
100
125
150
Elements in HashSet2
30
60
100
150
200
250
Do they share common elements? True
Does HashSet1 has element 60? False
Does HashSet2 has element 60? True
示例
Let us now see another example;using System;
using System.Collections.Generic;
public class Demo {
public static void Main(){
HashSet<string> hashSet = new HashSet<string>();
hashSet.Add("Tim");
hashSet.Add("Jack");
hashSet.Add("Matt");
hashSet.Add("Steve");
hashSet.Add("David");
hashSet.Add("Kane");
hashSet.Add("Gary");
Console.WriteLine("Elements in HashSet");
foreach(string val in hashSet){
Console.WriteLine(val);
}
if (hashSet.Contains("Matt"))
Console.WriteLine("The element Matt is in the HashSet");
else
Console.WriteLine("The element Matt is not in the HashSet");
}
}
输出结果
这将产生以下输出-
Elements in HashSetTim
Jack
Matt
Steve
David
Kane
Gary
The element Matt is in the HashSet
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