BitArray.Set メソッドとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

BitArray.Set メソッド

BitArray の特定位置にあるビットを指定した値に設定します。

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

Visual Basic (宣言)

Public Sub Set ( _
    index As Integer, _
    value As Boolean _
)

Visual Basic (使用法)

Dim instance As BitArray
Dim index As Integer
Dim value As Boolean

instance.Set(index, value)

public void Set (
    int index,
    bool value
)

C++

public:
void Set (
    int index, 
    bool value
)

public void Set (
    int index, 
    boolean value
)

JScript

public function Set (
    index : int, 
    value : boolean
)

パラメータ

index: 設定するビットの、0 から始まるインデックス番号。

value: ビットに代入するブール値。

例外

例外の種類	条件
ArgumentOutOfRangeException	index が 0 未満です。または index が BitArray の要素数以上です。

例外の種類

条件

ArgumentOutOfRangeException

index が 0 未満です。

または

index が BitArray の要素数以上です。

解説

このメソッドは O(1) 操作です。

使用例

BitArray の特定の要素を設定または取得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 SamplesBitArray    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a BitArray.
        Dim myBA As New
 BitArray(5)
        
        ' Displays the properties and values of the BitArray.
        Console.WriteLine("myBA values:")
        PrintIndexAndValues(myBA)
        
        ' Sets all the elements to true.
        myBA.SetAll(True)
        
        ' Displays the properties and values of the BitArray.
        Console.WriteLine("After setting all elements to true
,")
        PrintIndexAndValues(myBA)
        
        ' Sets the last index to false.
        myBA.Set(myBA.Count - 1, False)
        
        ' Displays the properties and values of the BitArray.
        Console.WriteLine("After setting the last element to false
,")
        PrintIndexAndValues(myBA)
        
        ' Gets the value of the last two elements.
        Console.WriteLine("The last two elements are: ")
        Console.WriteLine("    at index {0} : {1}",
 _
           myBA.Count - 2, myBA.Get(myBA.Count - 2))
        Console.WriteLine("    at index {0} : {1}",
 _
           myBA.Count - 1, myBA.Get(myBA.Count - 1))
    End Sub 'Main

    Public Shared Sub PrintIndexAndValues(myCol
 As IEnumerable)
        Dim i As Integer
        Dim obj As Object
        i = 0
        For Each obj In
  myCol
            Console.WriteLine("    [{0}]:    {1}",
 i, obj)
            i = i + 1
        Next obj
        Console.WriteLine()
    End Sub 'PrintValues

End Class

' This code produces the following output.
' 
' myBA values:
'     [0]:    False
'     [1]:    False
'     [2]:    False
'     [3]:    False
'     [4]:    False
' 
' After setting all elements to true,
'     [0]:    True
'     [1]:    True
'     [2]:    True
'     [3]:    True
'     [4]:    True
' 
' After setting the last element to false,
'     [0]:    True
'     [1]:    True
'     [2]:    True
'     [3]:    True
'     [4]:    False
' 
' The last two elements are:
'     at index 3 : True
'     at index 4 : False

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

   public static void Main()
  {

      // Creates and initializes a BitArray.
      BitArray myBA = new BitArray( 5 );

      // Displays the properties and values of the BitArray.
      Console.WriteLine( "myBA values:" );
      PrintIndexAndValues( myBA );

      // Sets all the elements to true.
      myBA.SetAll( true );

      // Displays the properties and values of the BitArray.
      Console.WriteLine( "After setting all elements to true,"
 );
      PrintIndexAndValues( myBA );

      // Sets the last index to false.
      myBA.Set( myBA.Count - 1, false );

      // Displays the properties and values of the BitArray.
      Console.WriteLine( "After setting the last element to false,"
 );
      PrintIndexAndValues( myBA );

      // Gets the value of the last two elements.
      Console.WriteLine( "The last two elements are: " );
      Console.WriteLine( "    at index {0} : {1}", myBA.Count - 2, myBA.Get(
 myBA.Count - 2 ) );
      Console.WriteLine( "    at index {0} : {1}", myBA.Count - 1, myBA.Get(
 myBA.Count - 1 ) );
   }


   public static void PrintIndexAndValues(
 IEnumerable myCol )  {
      int i = 0;
      foreach ( Object obj in myCol ) {
         Console.WriteLine( "    [{0}]:    {1}", i++, obj );
      }
      Console.WriteLine();
   }

}
/* 
This code produces the following output.

myBA values:
    [0]:    False
    [1]:    False
    [2]:    False
    [3]:    False
    [4]:    False

After setting all elements to true,
    [0]:    True
    [1]:    True
    [2]:    True
    [3]:    True
    [4]:    True

After setting the last element to false,
    [0]:    True
    [1]:    True
    [2]:    True
    [3]:    True
    [4]:    False

The last two elements are:
    at index 3 : True
    at index 4 : False

*/

C++

using namespace System;
using namespace System::Collections;
void PrintIndexAndValues( IEnumerable^ myCol );
int main()
{
   
   // Creates and initializes a BitArray.
   BitArray^ myBA = gcnew BitArray( 5 );
   
   // Displays the properties and values of the BitArray.
   Console::WriteLine( "myBA values:" );
   PrintIndexAndValues( myBA );
   
   // Sets all the elements to true.
   myBA->SetAll( true );
   
   // Displays the properties and values of the BitArray.
   Console::WriteLine( "After setting all elements to true,"
 );
   PrintIndexAndValues( myBA );
   
   // Sets the last index to false.
   myBA->Set( myBA->Count - 1, false );
   
   // Displays the properties and values of the BitArray.
   Console::WriteLine( "After setting the last element to false,"
 );
   PrintIndexAndValues( myBA );
   
   // Gets the value of the last two elements.
   Console::WriteLine( "The last two elements are: " );
   Console::WriteLine( "    at index {0} : {1}", myBA->Count - 2, myBA->Get(
 myBA->Count - 2 ) );
   Console::WriteLine( "    at index {0} : {1}", myBA->Count - 1, myBA->Get(
 myBA->Count - 1 ) );
}

void PrintIndexAndValues( IEnumerable^ myCol )
{
   int i = 0;
   IEnumerator^ myEnum = myCol->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ obj = safe_cast<Object^>(myEnum->Current);
      Console::WriteLine( "    [{0}]:    {1}", i++, obj );
   }

   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 myBA values:
     [0]:    False
     [1]:    False
     [2]:    False
     [3]:    False
     [4]:    False

 After setting all elements to true,
     [0]:    True
     [1]:    True
     [2]:    True
     [3]:    True
     [4]:    True

 After setting the last element to false,
     [0]:    True
     [1]:    True
     [2]:    True
     [3]:    True
     [4]:    False

 The last two elements are:
     at index 3 : True
     at index 4 : False

 */

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

public class SamplesBitArray
{
    public static void main(String[]
 args)
    {
        // Creates and initializes a BitArray.
        BitArray myBA = new BitArray(5);
        // Displays the properties and values of the BitArray.
        Console.WriteLine("myBA values:");
        PrintIndexAndValues(myBA);

        // Sets all the elements to true.
        myBA.SetAll(true);

        // Displays the properties and values of the BitArray.
        Console.WriteLine("After setting all elements to true
,");
        PrintIndexAndValues(myBA);

        // Sets the last index to false.
        myBA.Set(myBA.get_Count() - 1, false);

        // Displays the properties and values of the BitArray.
        Console.WriteLine("After setting the last element to false
,");
        PrintIndexAndValues(myBA);

        // Gets the value of the last two elements.
        Console.WriteLine("The last two elements are: ");
        Console.WriteLine("    at index {0} : {1}", 
            System.Convert.ToString(myBA.get_Count() - 2), 
            System.Convert.ToString(myBA.Get((myBA.get_Count() - 2))));
        Console.WriteLine("    at index {0} : {1}", 
            System.Convert.ToString(myBA.get_Count() - 1), 
            System.Convert.ToString(myBA.Get((myBA.get_Count() - 1))));
    } //main

    public static void PrintIndexAndValues(IEnumerable
 myCol)
    {
        int i = 0;
        IEnumerator objMyEnum = myCol.GetEnumerator();
        while (objMyEnum.MoveNext()) {
            Object obj = objMyEnum.get_Current();
            Console.WriteLine("    [{0}]:    {1}", (Int32)i++, obj);
        }
        Console.WriteLine();
    } //PrintIndexAndValues
} //SamplesBitArray 
/* 
 This code produces the following output.
 
 myBA values:
     [0]:    False
     [1]:    False
     [2]:    False
     [3]:    False
     [4]:    False

 After setting all elements to true,
     [0]:    True
     [1]:    True
     [2]:    True
     [3]:    True
     [4]:    True

 After setting the last element to false,
     [0]:    True
     [1]:    True
     [2]:    True
     [3]:    True
     [4]:    False

 The last two elements are:
     at index 3 : True
     at index 4 : False

 */

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

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

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BitArray.Set メソッドとは？ わかりやすく解説

BitArray.Set メソッド

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BitArray.Set メソッドとは？わかりやすく解説