Array.Clone メソッド
重要
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Array の簡易コピーを作成します。
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
Array の簡易コピー。
次のコード例では、配列を System.Globalization.CultureInfo 複製し、浅いコピーの動作を示します。
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 -.
浅いコピー Array では、参照型か値型かに関係なく、要素のみが Arrayコピーされますが、参照が参照するオブジェクトはコピーされません。 新しい Array 参照は、元 Array の参照が指しているのと同じオブジェクトを指します。
一方、要素の Array ディープ コピーでは、要素とその要素によって直接または間接的に参照されるすべてのものがコピーされます。
このメソッドは O(n
) 操作です。n
は Length です。