ArrayList.Repeat メソッド

.NET Framework クラス ライブラリ リファレンス

ArrayList.Repeat メソッド

要素が指定した値のコピーである ArrayList を返します。

名前空間: System.Collections
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Shared Function Repeat
 ( _
    value As Object, _
    count As Integer _
) As ArrayList

Visual Basic (使用法)

Dim value As Object
Dim count As Integer
Dim returnValue As ArrayList

returnValue = ArrayList.Repeat(value, count)

C#

public static ArrayList Repeat (
    Object value,
    int count
)

C++

public:
static ArrayList^ Repeat (
    Object^ value, 
    int count
)

J#

public static ArrayList Repeat (
    Object value, 
    int count
)

JScript

public static function Repeat
 (
    value : Object, 
    count : int
) : ArrayList

パラメータ

value

新しい ArrayList で複数回コピーする Object。値は null 参照 (Visual Basic では Nothing) に設定できます。

count

value をコピーする回数。

戻り値
count 個の要素がある ArrayList。要素はすべて value のコピーです。

例外

例外の種類	条件
ArgumentOutOfRangeException	count が 0 未満です。

解説

ArrayList は、null 参照 (Visual Basic では Nothing) を有効な値として受け取り、要素の重複を許可します。

このメソッドは O(n) 操作です。ここで、n は count です。

使用例

同一の値を使用して新しい ArrayList を作成および初期化する方法を次のコード例に示します。

Visual Basic

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Public Class SamplesArrayList    

    Public Shared Sub Main()

        ' Creates a new ArrayList with five elements and initialize
 each
        ' element with a null value.
        Dim myAL As ArrayList = ArrayList.Repeat(Nothing,
 5)

        ' Displays the count, capacity and values of the ArrayList.
        Console.WriteLine("ArrayList with five elements with a
 null value")
        Console.WriteLine("   Count    : {0}", myAL.Count)
        Console.WriteLine("   Capacity : {0}", myAL.Capacity)
        Console.Write("   Values:")
        PrintValues(myAL)

        ' Creates a new ArrayList with seven elements and initialize
 each
        ' element with the string "abc".
        myAL = ArrayList.Repeat("abc", 7)

        ' Displays the count, capacity and values of the ArrayList.
        Console.WriteLine("ArrayList with seven elements with
 a string value")
        Console.WriteLine("   Count    : {0}", myAL.Count)
        Console.WriteLine("   Capacity : {0}", myAL.Capacity)
        Console.Write("   Values:")
        PrintValues(myAL)

    End Sub 'Main

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

End Class


' This code produces the following output.
' 
' ArrayList with five elements with a null value
'    Count    : 5
'    Capacity : 16
'    Values:                    
' ArrayList with seven elements with a string value
'    Count    : 7
'    Capacity : 16
'    Values:    abc    abc    abc    abc    abc    abc    abc

C#

using System;
using System.Collections;
public class SamplesArrayList  {

   public static void Main()
  {

      // Creates a new ArrayList with five elements and initialize each
 element with a null value.
      ArrayList myAL = ArrayList.Repeat( null, 5 );

      // Displays the count, capacity and values of the ArrayList.
      Console.WriteLine( "ArrayList with five elements with a null
 value" );
      Console.WriteLine( "   Count    : {0}", myAL.Count );
      Console.WriteLine( "   Capacity : {0}", myAL.Capacity );
      Console.Write( "   Values:" );
      PrintValues( myAL );

      // Creates a new ArrayList with seven elements and initialize
 each element with the string "abc".
      myAL = ArrayList.Repeat( "abc", 7 );

      // Displays the count, capacity and values of the ArrayList.
      Console.WriteLine( "ArrayList with seven elements with a string
 value" );
      Console.WriteLine( "   Count    : {0}", myAL.Count );
      Console.WriteLine( "   Capacity : {0}", myAL.Capacity );
      Console.Write( "   Values:" );
      PrintValues( myAL );

   }

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

}
/* 
This code produces the following output.

ArrayList with five elements with a null value
   Count    : 5
   Capacity : 16
   Values:
ArrayList with seven elements with a string value
   Count    : 7
   Capacity : 16
   Values:   abc   abc   abc   abc   abc   abc   abc

*/ 

C++

using namespace System;
using namespace System::Collections;
void PrintValues( IEnumerable^ myList );
int main()
{
   
   // Creates a new ArrayList with five elements and initialize each
 element with a null value.
   ArrayList^ myAL = ArrayList::Repeat( 0, 5 );
   
   // Displays the count, capacity and values of the ArrayList.
   Console::WriteLine( "ArrayList with five elements with a null
 value" );
   Console::WriteLine( "   Count    : {0}", myAL->Count );
   Console::WriteLine( "   Capacity : {0}", myAL->Capacity );
   Console::Write( "   Values:" );
   PrintValues( myAL );
   
   // Creates a new ArrayList with seven elements and initialize each
 element with the string "abc".
   myAL = ArrayList::Repeat( "abc", 7 );
   
   // Displays the count, capacity and values of the ArrayList.
   Console::WriteLine( "ArrayList with seven elements with a string
 value" );
   Console::WriteLine( "   Count    : {0}", myAL->Count );
   Console::WriteLine( "   Capacity : {0}", myAL->Capacity );
   Console::Write( "   Values:" );
   PrintValues( myAL );
}

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

   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 ArrayList with five elements with a null value
    Count    : 5
    Capacity : 16
    Values:
 ArrayList with seven elements with a string value
    Count    : 7
    Capacity : 16
    Values:   abc   abc   abc   abc   abc   abc   abc

 */

J#

import System.*;
import System.Collections.*;

public class SamplesArrayList
{
    public static void main(String[]
 args)
    {
        // Creates a new ArrayList with five elements and initialize
 each 
        // element with a null value.
        ArrayList myAL = ArrayList.Repeat(null, 5);

        // Displays the count, capacity and values of the ArrayList.
        Console.WriteLine("ArrayList with five elements with a null
 value");
        Console.WriteLine("   Count    : {0}", (Int32)myAL.get_Count());
        Console.WriteLine("   Capacity : {0}", (Int32)myAL.get_Capacity());
        Console.Write("   Values:");
        PrintValues(myAL);

        // Creates a new ArrayList with seven elements and initialize
 each 
        // element with the string "abc".
        myAL = ArrayList.Repeat("abc", 7);

        // Displays the count, capacity and values of the ArrayList.
        Console.WriteLine("ArrayList with seven elements with a string
 value");
        Console.WriteLine("   Count    : {0}", (Int32)myAL.get_Count());
        Console.WriteLine("   Capacity : {0}", (Int32)myAL.get_Capacity());
        Console.Write("   Values:");
        PrintValues(myAL);
    } //main

    public static void PrintValues(IEnumerable
 myList)
    {
        IEnumerator objMyEnum = myList.GetEnumerator();
        while (objMyEnum.MoveNext()) {
            Object obj = objMyEnum.get_Current();
            Console.Write("   {0}", obj);
        }
        Console.WriteLine();
    } //PrintValues
} //SamplesArrayList 
/* 
 This code produces the following output.
 
 ArrayList with five elements with a null value
    Count    : 5
    Capacity : 16
    Values:
 ArrayList with seven elements with a string value
    Count    : 7
    Capacity : 16
    Values:   abc   abc   abc   abc   abc   abc   abc

 */

JScript

import System;
import System.Collections;

// Creates a new ArrayList with five elements and initialize each element
 with a null value.
var myAL : ArrayList = ArrayList.Repeat( null,
 5 );

// Displays the count, capacity and values of the ArrayList.
Console.WriteLine( "ArrayList with five elements with a null
 value" );
Console.WriteLine( "   Count    : {0}", myAL.Count );
Console.WriteLine( "   Capacity : {0}", myAL.Capacity );
Console.Write( "   Values:" );
PrintValues( myAL );

// Creates a new ArrayList with seven elements and initialize each element
 with the string "abc".
myAL = ArrayList.Repeat( "abc", 7 );

// Displays the count, capacity and values of the ArrayList.
Console.WriteLine( "ArrayList with seven elements with a string
 value" );
Console.WriteLine( "   Count    : {0}", myAL.Count );
Console.WriteLine( "   Capacity : {0}", myAL.Capacity );
Console.Write( "   Values:" );
PrintValues( myAL );

function PrintValues( myList : IEnumerable )  {
   var myEnumerator : System.Collections.IEnumerator  = myList.GetEnumerator();
   while ( myEnumerator.MoveNext() )
      Console.Write( "\t{0}", myEnumerator.Current );
   Console.WriteLine();
}
 /* 
 This code produces the following output.
 
 ArrayList with five elements with a null value
    Count    : 5
    Capacity : 16
    Values:                    
 ArrayList with seven elements with a string value
    Count    : 7
    Capacity : 16
    Values:    abc    abc    abc    abc    abc    abc    abc
 */ 

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
ArrayList クラス
ArrayList メンバ
System.Collections 名前空間