C#中的Queue.Contains()方法
C#中的Queue.Contains()方法用于确定元素是否在Queue中。
语法
语法如下-
public virtual bool Contains (object ob);
上面的参数ob是要在队列中定位的对象。
示例
现在让我们看一个例子-
using System;
using System.Collections.Generic;
public class Demo {
public static void Main() {
Queue<string> queue = new Queue<string>();
queue.Enqueue("Gary");
queue.Enqueue("Jack");
queue.Enqueue("Ryan");
queue.Enqueue("Kevin");
queue.Enqueue("Mark");
queue.Enqueue("Jack");
queue.Enqueue("Ryan");
queue.Enqueue("Kevin");
Console.Write("Count of elements = ");
Console.WriteLine(queue.Count);
Console.WriteLine("Does the queue has element Jack? = "+queue.Contains("Jack"));
queue.Clear();
Console.Write("Count of elements (updated) = ");
Console.WriteLine(queue.Count);
}
}输出结果
这将产生以下输出-
Count of elements = 8 Does the queue has element Jack? = True Count of elements (updated) = 0
示例
现在让我们来看另一个例子-
using System;
using System.Collections.Generic;
public class Demo {
public static void Main() {
Queue<int> queue = new Queue<int>();
queue.Enqueue(100);
queue.Enqueue(200);
queue.Enqueue(300);
Console.Write("Count of elements = ");
Console.WriteLine(queue.Count);
Console.WriteLine("Does the queue has element 500? = "+queue.Contains(500));
queue.Clear();
Console.Write("Count of elements (updated) = ");
Console.WriteLine(queue.Count);
}
}输出结果
这将产生以下输出-
Count of elements = 3 Does the queue has element 500? = False Count of elements (updated) = 0