Stack.Clear Metoda
Ważne
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Usuwa wszystkie obiekty z obiektu Stack.
public:
virtual void Clear();
public virtual void Clear ();
abstract member Clear : unit -> unit
override this.Clear : unit -> unit
Public Overridable Sub Clear ()
W poniższym przykładzie pokazano, jak wyczyścić wartości elementu 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:
Count parametr jest ustawiony na zero, a odwołania do innych obiektów z elementów kolekcji również są zwalniane.
Ta metoda jest operacją O(n)
, gdzie n
to Count.
Produkt | Wersje |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
UWP | 10.0 |
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