Stack.Clear Methode

Definition

Entfernt alle Objekte aus dem Stack.Removes all objects from the Stack.

public:
 virtual void Clear();
public virtual void Clear ();
abstract member Clear : unit -> unit
override this.Clear : unit -> unit
Public Overridable Sub Clear ()

Beispiele

Im folgenden Beispiel wird gezeigt, wie die Werte der Stackgelöscht werden.The following example shows how to clear the values of the Stack.

using namespace System;
using namespace System::Collections;
void PrintValues( IEnumerable^ myCollection );
int main()
{
   
   // Creates and initializes a new Stack.
   Stack^ myStack = gcnew Stack;
   myStack->Push( "The" );
   myStack->Push( "quick" );
   myStack->Push( "brown" );
   myStack->Push( "fox" );
   myStack->Push( "jumps" );
   
   // Displays the count and values of the Stack.
   Console::WriteLine( "Initially," );
   Console::WriteLine( "   Count    : {0}", myStack->Count );
   Console::Write( "   Values:" );
   PrintValues( myStack );
   
   // Clears the Stack.
   myStack->Clear();
   
   // Displays the count and values of the Stack.
   Console::WriteLine( "After Clear," );
   Console::WriteLine( "   Count    : {0}", myStack->Count );
   Console::Write( "   Values:" );
   PrintValues( myStack );
}

void PrintValues( IEnumerable^ myCollection )
{
   IEnumerator^ myEnum = myCollection->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ obj = safe_cast<Object^>(myEnum->Current);
      Console::Write( "    {0}", obj );
   }

   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 Initially,
    Count    : 5
    Values:    jumps    fox    brown    quick    The
 After Clear,
    Count    : 0
    Values:
 */
using System;
using System.Collections;

public class SamplesStack  {

   public static void Main()  {

      // Creates and initializes a new Stack.
      Stack myStack = new Stack();
      myStack.Push( "The" );
      myStack.Push( "quick" );
      myStack.Push( "brown" );
      myStack.Push( "fox" );
      myStack.Push( "jumps" );

      // Displays the count and values of the Stack.
      Console.WriteLine( "Initially," );
      Console.WriteLine( "   Count    : {0}", myStack.Count );
      Console.Write( "   Values:" );
      PrintValues( myStack );

      // Clears the Stack.
      myStack.Clear();

      // Displays the count and values of the Stack.
      Console.WriteLine( "After Clear," );
      Console.WriteLine( "   Count    : {0}", myStack.Count );
      Console.Write( "   Values:" );
      PrintValues( myStack );

   }

   public static void PrintValues( IEnumerable myCollection )  {
      foreach ( Object obj in myCollection )
         Console.Write( "    {0}", obj );
      Console.WriteLine();
   }

}


/* 
This code produces the following output.

Initially,
   Count    : 5
   Values:    jumps    fox    brown    quick    The
After Clear,
   Count    : 0
   Values:
*/ 

Imports System.Collections

Public Class SamplesStack    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new Stack.
        Dim myStack As New Stack()
        myStack.Push("The")
        myStack.Push("quick")
        myStack.Push("brown")
        myStack.Push("fox")
        myStack.Push("jumps")
        
        ' Displays the count and values of the Stack.
        Console.WriteLine("Initially,")
        Console.WriteLine("   Count    : {0}", myStack.Count)
        Console.Write("   Values:")
        PrintValues(myStack)
        
        ' Clears the Stack.
        myStack.Clear()
        
        ' Displays the count and values of the Stack.
        Console.WriteLine("After Clear,")
        Console.WriteLine("   Count    : {0}", myStack.Count)
        Console.Write("   Values:")
        PrintValues(myStack)

    End Sub    

    Public Shared Sub PrintValues(myCollection As IEnumerable)
        Dim obj As [Object]
        For Each obj In  myCollection
            Console.Write("    {0}", obj)
        Next obj
        Console.WriteLine()
    End Sub

End Class


' This code produces the following output.
' 
' Initially,
'    Count    : 5
'    Values:    jumps    fox    brown    quick    The
' After Clear,
'    Count    : 0
'    Values:

Hinweise

Count ist auf NULL festgelegt, und Verweise auf andere Objekte von Elementen der Auflistung werden ebenfalls freigegeben.Count is set to zero, and references to other objects from elements of the collection are also released.

Bei dieser Methode handelt es sich um eine O(n) Operation, bei der n Countist.This method is an O(n) operation, where n is Count.

Gilt für: