Array.Clone Metodo

Riferimento

Definizione

Spazio dei nomi:: System

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Importante

Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.

Crea una copia superficiale di Array.

public:
 System::Object ^ Clone();

public:
 virtual System::Object ^ Clone();

public object Clone ();

public virtual object Clone ();

member this.Clone : unit -> obj

abstract member Clone : unit -> obj
override this.Clone : unit -> obj

Public Function Clone () As Object

Public Overridable Function Clone () As Object

Restituisce

Object

Copia superficiale di Array.

Implementazioni

Clone()

Esempio

L'esempio di codice seguente clona una System.Globalization.CultureInfo matrice e illustra il comportamento di una copia superficiale.

using namespace System;
using namespace System::Globalization;
void PrintIndexAndValues( Array^ myArray );
int main()
{
   
   // Create and initialize a new CultureInfo array.
   CultureInfo^ ci0 = gcnew CultureInfo( "ar-SA",false );
   CultureInfo^ ci1 = gcnew CultureInfo( "en-US",false );
   CultureInfo^ ci2 = gcnew CultureInfo( "fr-FR",false );
   CultureInfo^ ci3 = gcnew CultureInfo( "ja-JP",false );
   array<CultureInfo^>^arrCI = {ci0,ci1,ci2,ci3};
   
   // Create a clone of the CultureInfo array.
   array<CultureInfo^>^arrCIClone = (array<CultureInfo^>^)arrCI->Clone();
   
   // Replace an element in the clone array.
   CultureInfo^ ci4 = gcnew CultureInfo( "th-TH",false );
   arrCIClone[ 0 ] = ci4;
   
   // Display the contents of the original array.
   Console::WriteLine( "The original array contains the following values:" );
   PrintIndexAndValues( arrCI );
   
   // Display the contents of the clone array.
   Console::WriteLine( "The clone array contains the following values:" );
   PrintIndexAndValues( arrCIClone );
   
   // Display the DateTimeFormatInfo.DateSeparator for the fourth element in both arrays.
   Console::WriteLine( "Before changes to the clone:" );
   Console::WriteLine( "   Original: The DateTimeFormatInfo->DateSeparator for {0} is {1}.", arrCI[ 3 ]->Name, arrCI[ 3 ]->DateTimeFormat->DateSeparator );
   Console::WriteLine( "      Clone: The DateTimeFormatInfo->DateSeparator for {0} is {1}.", arrCIClone[ 3 ]->Name, arrCIClone[ 3 ]->DateTimeFormat->DateSeparator );
   
   // Replace the DateTimeFormatInfo.DateSeparator for the fourth element in the clone array.
   arrCIClone[ 3 ]->DateTimeFormat->DateSeparator = "-";
   
   // Display the DateTimeFormatInfo.DateSeparator for the fourth element in both arrays.
   Console::WriteLine( "After changes to the clone:" );
   Console::WriteLine( "   Original: The DateTimeFormatInfo->DateSeparator for {0} is {1}.", arrCI[ 3 ]->Name, arrCI[ 3 ]->DateTimeFormat->DateSeparator );
   Console::WriteLine( "      Clone: The DateTimeFormatInfo->DateSeparator for {0} is {1}.", arrCIClone[ 3 ]->Name, arrCIClone[ 3 ]->DateTimeFormat->DateSeparator );
}

void PrintIndexAndValues( Array^ myArray )
{
   for ( int i = myArray->GetLowerBound( 0 ); i <= myArray->GetUpperBound( 0 ); i++ )
      Console::WriteLine( "\t[{0}]:\t{1}", i, myArray->GetValue( i ) );
}

/* 
This code produces the following output.

The original array contains the following values:
        [0]:    ar-SA
        [1]:    en-US
        [2]:    fr-FR
        [3]:    ja-JP
The clone array contains the following values:
        [0]:    th-TH
        [1]:    en-US
        [2]:    fr-FR
        [3]:    ja-JP
Before changes to the clone:
   Original: The DateTimeFormatInfo.DateSeparator for ja-JP is /.
      Clone: The DateTimeFormatInfo.DateSeparator for ja-JP is /.
After changes to the clone:
   Original: The DateTimeFormatInfo.DateSeparator for ja-JP is -.
      Clone: The DateTimeFormatInfo.DateSeparator for ja-JP is -.

*/

using System;
using System.Globalization;
public class SamplesArray  {

   public static void Main()  {

      // Create and initialize a new CultureInfo array.
      CultureInfo ci0 = new CultureInfo( "ar-SA", false );
      CultureInfo ci1 = new CultureInfo( "en-US", false );
      CultureInfo ci2 = new CultureInfo( "fr-FR", false );
      CultureInfo ci3 = new CultureInfo( "ja-JP", false );
      CultureInfo[] arrCI = new CultureInfo[] { ci0, ci1, ci2, ci3 };

      // Create a clone of the CultureInfo array.
      CultureInfo[] arrCIClone = (CultureInfo[]) arrCI.Clone();

      // Replace an element in the clone array.
      CultureInfo ci4 = new CultureInfo( "th-TH", false );
      arrCIClone[0] = ci4;

      // Display the contents of the original array.
      Console.WriteLine( "The original array contains the following values:" );
      PrintIndexAndValues( arrCI );

      // Display the contents of the clone array.
      Console.WriteLine( "The clone array contains the following values:" );
      PrintIndexAndValues( arrCIClone );

      // Display the DateTimeFormatInfo.DateSeparator for the fourth element in both arrays.
      Console.WriteLine( "Before changes to the clone:" );
      Console.WriteLine( "   Original: The DateTimeFormatInfo.DateSeparator for {0} is {1}.", arrCI[3].Name, arrCI[3].DateTimeFormat.DateSeparator );
      Console.WriteLine( "      Clone: The DateTimeFormatInfo.DateSeparator for {0} is {1}.", arrCIClone[3].Name, arrCIClone[3].DateTimeFormat.DateSeparator );

      // Replace the DateTimeFormatInfo.DateSeparator for the fourth element in the clone array.
      arrCIClone[3].DateTimeFormat.DateSeparator = "-";

      // Display the DateTimeFormatInfo.DateSeparator for the fourth element in both arrays.
      Console.WriteLine( "After changes to the clone:" );
      Console.WriteLine( "   Original: The DateTimeFormatInfo.DateSeparator for {0} is {1}.", arrCI[3].Name, arrCI[3].DateTimeFormat.DateSeparator );
      Console.WriteLine( "      Clone: The DateTimeFormatInfo.DateSeparator for {0} is {1}.", arrCIClone[3].Name, arrCIClone[3].DateTimeFormat.DateSeparator );
   }

   public static void PrintIndexAndValues( Array myArray )  {
      for ( int i = myArray.GetLowerBound(0); i <= myArray.GetUpperBound(0); i++ )
         Console.WriteLine( "\t[{0}]:\t{1}", i, myArray.GetValue( i ) );
   }
}


/*
This code produces the following output.

The original array contains the following values:
        [0]:    ar-SA
        [1]:    en-US
        [2]:    fr-FR
        [3]:    ja-JP
The clone array contains the following values:
        [0]:    th-TH
        [1]:    en-US
        [2]:    fr-FR
        [3]:    ja-JP
Before changes to the clone:
   Original: The DateTimeFormatInfo.DateSeparator for ja-JP is /.
      Clone: The DateTimeFormatInfo.DateSeparator for ja-JP is /.
After changes to the clone:
   Original: The DateTimeFormatInfo.DateSeparator for ja-JP is -.
      Clone: The DateTimeFormatInfo.DateSeparator for ja-JP is -.

*/

open System
open System.Globalization

let printIndexAndValues (myArray: 'a []) =
    for i = myArray.GetLowerBound 0 to myArray.GetUpperBound 0 do
        printfn $"\t[{i}]:\t{myArray[i]}"

// Create and initialize a new CultureInfo array.
let ci0 = CultureInfo("ar-SA", false)
let ci1 = CultureInfo("en-US", false)
let ci2 = CultureInfo("fr-FR", false)
let ci3 = CultureInfo("ja-JP", false)
let arrCI = [| ci0; ci1; ci2; ci3 |]

// Create a clone of the CultureInfo array.
let arrCIClone = arrCI.Clone() :?> CultureInfo []

// Replace an element in the clone array.
let ci4 = CultureInfo("th-TH", false)
arrCIClone[0] <- ci4

// Display the contents of the original array.
printfn "The original array contains the following values:"
printIndexAndValues arrCI

// Display the contents of the clone array.
printfn "The clone array contains the following values:"
printIndexAndValues arrCIClone

// Display the DateTimeFormatInfo.DateSeparator for the fourth element in both arrays.
printfn "Before changes to the clone:"
printfn $"   Original: The DateTimeFormatInfo.DateSeparator for {arrCI[3].Name} is {arrCI[3].DateTimeFormat.DateSeparator}."
printfn $"      Clone: The DateTimeFormatInfo.DateSeparator for {arrCIClone[3].Name} is {arrCIClone[3].DateTimeFormat.DateSeparator}."

// Replace the DateTimeFormatInfo.DateSeparator for the fourth element in the clone array.
arrCIClone[3].DateTimeFormat.DateSeparator <- "-"

// Display the DateTimeFormatInfo.DateSeparator for the fourth element in both arrays.
printfn "After changes to the clone:"
printfn $"   Original: The DateTimeFormatInfo.DateSeparator for {arrCI[3].Name} is {arrCI[3].DateTimeFormat.DateSeparator}."
printfn $"      Clone: The DateTimeFormatInfo.DateSeparator for {arrCIClone[3].Name} is {arrCIClone[3].DateTimeFormat.DateSeparator}."


// This code produces the following output.
//     The original array contains the following values:
//             [0]:    ar-SA
//             [1]:    en-US
//             [2]:    fr-FR
//             [3]:    ja-JP
//     The clone array contains the following values:
//             [0]:    th-TH
//             [1]:    en-US
//             [2]:    fr-FR
//             [3]:    ja-JP
//     Before changes to the clone:
//        Original: The DateTimeFormatInfo.DateSeparator for ja-JP is /.
//           Clone: The DateTimeFormatInfo.DateSeparator for ja-JP is /.
//     After changes to the clone:
//        Original: The DateTimeFormatInfo.DateSeparator for ja-JP is -.
//           Clone: The DateTimeFormatInfo.DateSeparator for ja-JP is -.

Imports System.Globalization

Public Class SamplesArray

    Public Shared Sub Main()

        ' Create and initialize a new CultureInfo array.
        Dim ci0 As New CultureInfo("ar-SA", False)
        Dim ci1 As New CultureInfo("en-US", False)
        Dim ci2 As New CultureInfo("fr-FR", False)
        Dim ci3 As New CultureInfo("ja-JP", False)
        Dim arrCI() As CultureInfo = {ci0, ci1, ci2, ci3}

        ' Create a clone of the CultureInfo array.
        Dim arrCIClone As CultureInfo() = CType(arrCI.Clone(), CultureInfo())

        ' Replace an element in the clone array.
        Dim ci4 As New CultureInfo("th-TH", False)
        arrCIClone(0) = ci4

        ' Display the contents of the original array.
        Console.WriteLine("The original array contains the following values:")
        PrintIndexAndValues(arrCI)

        ' Display the contents of the clone array.
        Console.WriteLine("The clone array contains the following values:")
        PrintIndexAndValues(arrCIClone)

        ' Display the DateTimeFormatInfo.DateSeparator for the fourth element in both arrays.
        Console.WriteLine("Before changes to the clone:")
        Console.WriteLine("   Original: The DateTimeFormatInfo.DateSeparator for {0} is {1}.", arrCI(3).Name, arrCI(3).DateTimeFormat.DateSeparator)
        Console.WriteLine("      Clone: The DateTimeFormatInfo.DateSeparator for {0} is {1}.", arrCIClone(3).Name, arrCIClone(3).DateTimeFormat.DateSeparator)

        ' Replace the DateTimeFormatInfo.DateSeparator for the fourth element in the clone array.
        arrCIClone(3).DateTimeFormat.DateSeparator = "-"

        ' Display the DateTimeFormatInfo.DateSeparator for the fourth element in both arrays.
        Console.WriteLine("After changes to the clone:")
        Console.WriteLine("   Original: The DateTimeFormatInfo.DateSeparator for {0} is {1}.", arrCI(3).Name, arrCI(3).DateTimeFormat.DateSeparator)
        Console.WriteLine("      Clone: The DateTimeFormatInfo.DateSeparator for {0} is {1}.", arrCIClone(3).Name, arrCIClone(3).DateTimeFormat.DateSeparator)

    End Sub

    Public Shared Sub PrintIndexAndValues(myArray As Array)
        Dim i As Integer
        For i = myArray.GetLowerBound(0) To myArray.GetUpperBound(0)
            Console.WriteLine(vbTab + "[{0}]:" + vbTab + "{1}", i, myArray.GetValue(i))
        Next i
    End Sub

End Class


'This code produces the following output.
'
'The original array contains the following values:
'        [0]:    ar-SA
'        [1]:    en-US
'        [2]:    fr-FR
'        [3]:    ja-JP
'The clone array contains the following values:
'        [0]:    th-TH
'        [1]:    en-US
'        [2]:    fr-FR
'        [3]:    ja-JP
'Before changes to the clone:
'   Original: The DateTimeFormatInfo.DateSeparator for ja-JP is /.
'      Clone: The DateTimeFormatInfo.DateSeparator for ja-JP is /.
'After changes to the clone:
'   Original: The DateTimeFormatInfo.DateSeparator for ja-JP is -.
'      Clone: The DateTimeFormatInfo.DateSeparator for ja-JP is -.

Commenti

Una copia superficiale di un Array oggetto copia solo gli elementi dell'oggetto Array, indipendentemente dal fatto che siano tipi riferimento o tipi valore, ma non copia gli oggetti a cui fanno riferimento i riferimenti. Riferimenti nel nuovo Array punto agli stessi oggetti a cui fa riferimento il punto originale Array .

Al contrario, una copia completa di un Array oggetto copia gli elementi e tutto direttamente o indirettamente a cui fanno riferimento gli elementi.

Il clone è uguale a Type quello originale Array.

Questo metodo è un'operazione O(n), dove n è Length.

Si applica a

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