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。

Public Shared Function Repeat( _
   ByVal value As Object, _   ByVal count As Integer _) As ArrayList
[C#]
public static ArrayList Repeat(objectvalue,intcount);
[C++]
public: static ArrayList* Repeat(Object* value,intcount);
[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

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。

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例に示します。

 
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 myEnumerator As System.Collections.IEnumerator = _
           myList.GetEnumerator()
        While myEnumerator.MoveNext()
            Console.Write(ControlChars.Tab + "{0}", myEnumerator.Current)
        End While
        Console.WriteLine()
    End Sub
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 )  {
      System.Collections.IEnumerator myEnumerator = 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
*/ 

[C++] 
#using <mscorlib.dll>
using namespace System;
using namespace System::Collections;

#define NULL 0

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( 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}", __box(myAL->Count) );
       Console::WriteLine( "   Capacity : {0}", __box(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( S"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}", __box(myAL->Count) );
       Console::WriteLine( "   Capacity : {0}", __box(myAL->Capacity) );
       Console::Write( "   Values:" );
       PrintValues( myAL );
    }
 
void PrintValues( IEnumerable* myList )  {
       System::Collections::IEnumerator* myEnumerator = 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
 */ 

[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
 */ 

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, Common Language Infrastructure (CLI) Standard

参照

ArrayList クラス | ArrayList メンバ | System.Collections 名前空間