C＃のStack.Contains（）メソッド

C＃のStack.Contains（）メソッドは、要素がスタックにあるかどうかを確認するために使用されます。

構文

構文は次のとおりです-

public virtual bool Contains (object ob);

上記では、obはスタックで検索されるオブジェクトです。

例

例を見てみましょう-

using System;
using System.Collections;
public class Demo {
   public static void Main() {
      Stack stack = new Stack();
      stack.Push("Inspiron");
      stack.Push("Alienware");
      stack.Push("Projectors");
      stack.Push("Monitors");
      stack.Push("XPS");
      stack.Push("Laptop");
      stack.Push("Notebook");
      Console.WriteLine("Stack elements...");
      foreach(string val in stack) {
         Console.WriteLine(val);
      }
      Console.WriteLine("Count of elements = "+stack.Count);
      Console.WriteLine("Element Speakers is the stack? = "+stack.Contains("Speakers"));
      stack.Push("Headphone");
      stack.Push("Keyboard");
      stack.Push("Earphone");
      Console.WriteLine("\nStack elements...updated");
      foreach(string val in stack) {
         Console.WriteLine(val);
      }
      Console.WriteLine("Count of elements (updated) = "+stack.Count);
      Console.WriteLine("Element Alienware is the stack? = "+stack.Contains("Alienware"));
      Stack stack2 = (Stack)stack.Clone();
      Console.WriteLine("\nStack elements...cloned");
      foreach(string val in stack2) {
         Console.WriteLine(val);
      }
      Console.Write("Count of elements (updated) = "+stack2.Count);
   }
}

出力

これにより、次の出力が生成されます-

Stack elements...
Notebook
Laptop
XPS
Monitors
Projectors
Alienware
Inspiron
Count of elements = 7
Element Speakers is the stack? = False
Stack elements...updated
Earphone
Keyboard
Headphone
Notebook
Laptop
XPS
Monitors
Projectors
Alienware
Inspiron
Count of elements (updated) = 10
Element Alienware is the stack? = True
Stack elements...cloned
Earphone
Keyboard
Headphone
Notebook
Laptop
XPS
Monitors
Projectors
Alienware
Inspiron
Count of elements (updated) = 10

例

別の例を見てみましょう-

using System;
using System.Collections;
public class Demo {
   public static void Main() {
      Stack stack = new Stack();
      stack.Push(150);
      stack.Push(300);
      stack.Push(500);
      stack.Push(750);
      stack.Push(1000);
      stack.Push(1250);
      stack.Push(1500);
      stack.Push(2000);
      stack.Push(2500);
      Console.WriteLine("Stack elements...");
      foreach(int val in stack) {
         Console.WriteLine(val);
      }
      Console.WriteLine("Count of elements = "+stack.Count);
      Console.WriteLine("Element 750 is the stack? = "+stack.Contains(750));
      stack.Push(3000);
      Console.WriteLine("\nStack elements...updated");
      foreach(int val in stack) {
         Console.WriteLine(val);
      }
      Console.WriteLine("Count of elements (updated) = "+stack.Count);
      Console.WriteLine("Element 5000 is the stack? = "+stack.Contains(5000));
      Stack stack2 = (Stack)stack.Clone();
      Console.WriteLine("\nStack elements...cloned");
      foreach(int val in stack2) {
         Console.WriteLine(val);
      }
      Console.Write("Count of elements (updated) = "+stack2.Count);
   }
}

出力

これにより、次の出力が生成されます-

Stack elements...
2500
2000
1500
1250
1000
750
500
300
150
Count of elements = 9
Element 750 is the stack? = True
Stack elements...updated
3000
2500
2000
1500
1250
1000
750
500
300
150
Count of elements (updated) = 10
Element 5000 is the stack? = False
Stack elements...cloned
3000
2500
2000
1500
1250
1000
750
500
300
150
Count of elements (updated) = 10