Queue.ToArray メソッド
アセンブリ: System (system.dll 内)

Dim instance As Queue(Of T) Dim returnValue As T() returnValue = instance.ToArray
Queue からコピーした要素を格納する新しい配列。


ToArray メソッドを含む、Queue ジェネリック クラスのいくつかのメソッドを使用したコード例を次に示します。
このコード例では、既定の容量で文字列のキューを作成し、Enqueue メソッドを使用して 5 つの文字列をキューに置きます。キューの要素は列挙されますが、キューの状態は変化しません。Dequeue メソッドを使用して、最初の文字列をキューから取り出します。Peek メソッドを使用してキュー内の次の項目を調べてから、Dequeue メソッドを使用してキューから取り出します。
ToArray メソッドを使用して配列を作成し、その配列にキュー要素をコピーしてから、IEnumerable を受け取る Queue コンストラクタに配列を渡してキューのコピーを作成します。コピーの要素が表示されます。
キューの 2 倍のサイズの配列が作成され、CopyTo メソッドを使用して配列の中央部で始まる配列要素をコピーします。Queue コンストラクタを再度使用して、先頭に 3 つの null 要素を含むキューの 2 つ目のコピーを作成します。
Contains メソッドにより、文字列 "four" がキューの最初のコピーに含まれていることを示します。その後で、Clear メソッドがコピーをクリアすると、Count プロパティによってキューが空であることが示されます。
Imports System Imports System.Collections.Generic Module Example Sub Main Dim numbers As New Queue(Of String) numbers.Enqueue("one") numbers.Enqueue("two") numbers.Enqueue("three") numbers.Enqueue("four") numbers.Enqueue("five") ' A queue can be enumerated without disturbing its contents. For Each number As String In numbers Console.WriteLine(number) Next Console.WriteLine(vbLf & "Dequeuing '{0}'", numbers.Dequeue()) Console.WriteLine("Peek at next item to dequeue: {0}", _ numbers.Peek()) Console.WriteLine("Dequeuing '{0}'", numbers.Dequeue()) ' Create a copy of the queue, using the ToArray method and the ' constructor that accepts an IEnumerable(Of T). Dim queueCopy As New Queue(Of String)(numbers.ToArray()) Console.WriteLine(vbLf & "Contents of the first copy:") For Each number As String In queueCopy Console.WriteLine(number) Next ' Create an array twice the size of the queue, compensating ' for the fact that Visual Basic allocates an extra array ' element. Copy the elements of the queue, starting at the ' middle of the array. Dim array2((numbers.Count * 2) - 1) As String numbers.CopyTo(array2, numbers.Count) ' Create a second queue, using the constructor that accepts an ' IEnumerable(Of T). Dim queueCopy2 As New Queue(Of String)(array2) Console.WriteLine(vbLf & _ "Contents of the second copy, with duplicates and nulls:") For Each number As String In queueCopy2 Console.WriteLine(number) Next Console.WriteLine(vbLf & "queueCopy.Contains(""four"") = {0}", _ queueCopy.Contains("four")) Console.WriteLine(vbLf & "queueCopy.Clear()") queueCopy.Clear() Console.WriteLine(vbLf & "queueCopy.Count = {0}", _ queueCopy.Count) End Sub End Module ' This code example produces the following output: ' 'one 'two 'three 'four 'five ' 'Dequeuing 'one' 'Peek at next item to dequeue: two ' 'Dequeuing 'two' ' 'Contents of the copy: 'three 'four 'five ' 'Contents of the second copy, with duplicates and nulls: ' ' ' 'three 'four 'five ' 'queueCopy.Contains("four") = True ' 'queueCopy.Clear() ' 'queueCopy.Count = 0
using System; using System.Collections.Generic; class Example { public static void Main() { Queue<string> numbers = new Queue<string>(); numbers.Enqueue("one"); numbers.Enqueue("two"); numbers.Enqueue("three"); numbers.Enqueue("four"); numbers.Enqueue("five"); // A queue can be enumerated without disturbing its contents. foreach( string number in numbers ) { Console.WriteLine(number); } Console.WriteLine("\nDequeuing '{0}'", numbers.Dequeue()); Console.WriteLine("Peek at next item to dequeue: {0}", numbers.Peek()); Console.WriteLine("Dequeuing '{0}'", numbers.Dequeue()); // Create a copy of the queue, using the ToArray method and the // constructor that accepts an IEnumerable<T>. Queue<string> queueCopy = new Queue<string>(numbers.ToArray()); Console.WriteLine("\nContents of the first copy:"); foreach( string number in queueCopy ) { Console.WriteLine(number); } // Create an array twice the size of the queue and copy the // elements of the queue, starting at the middle of the // array. string[] array2 = new string[numbers.Count * 2]; numbers.CopyTo(array2, numbers.Count); // Create a second queue, using the constructor that accepts an // IEnumerable(Of T). Queue<string> queueCopy2 = new Queue<string>(array2); Console.WriteLine("\nContents of the second copy, with duplicates and nulls:"); foreach( string number in queueCopy2 ) { Console.WriteLine(number); } Console.WriteLine("\nqueueCopy.Contains(\"four\") = {0}", queueCopy.Contains("four")); Console.WriteLine("\nqueueCopy.Clear()"); queueCopy.Clear(); Console.WriteLine("\nqueueCopy.Count = {0}", queueCopy.Count); } } /* This code example produces the following output: one two three four five Dequeuing 'one' Peek at next item to dequeue: two Dequeuing 'two' Contents of the copy: three four five Contents of the second copy, with duplicates and nulls: three four five queueCopy.Contains("four") = True queueCopy.Clear() queueCopy.Count = 0 */

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。


Queue.ToArray メソッド
アセンブリ: mscorlib (mscorlib.dll 内)

Dim instance As Queue Dim returnValue As Object() returnValue = instance.ToArray
Queue からコピーした要素を格納する新しい配列。


Queue を 1 次元の配列にコピーする方法の例を次に示します。
Imports System Imports System.Collections Imports Microsoft.VisualBasic Public Class SamplesQueue Public Shared Sub Main() ' Creates and initializes the source Queue. Dim mySourceQ As New Queue() mySourceQ.Enqueue("three") mySourceQ.Enqueue("napping") mySourceQ.Enqueue("cats") mySourceQ.Enqueue("in") mySourceQ.Enqueue("the") mySourceQ.Enqueue("barn") ' Creates and initializes the one-dimensional target Array. Dim myTargetArray As Array = Array.CreateInstance(GetType(String), 15) myTargetArray.SetValue("The", 0) myTargetArray.SetValue("quick", 1) myTargetArray.SetValue("brown", 2) myTargetArray.SetValue("fox", 3) myTargetArray.SetValue("jumped", 4) myTargetArray.SetValue("over", 5) myTargetArray.SetValue("the", 6) myTargetArray.SetValue("lazy", 7) myTargetArray.SetValue("dog", 8) ' Displays the values of the target Array. Console.WriteLine("The target Array contains the " & _ "following (before and after copying):") PrintValues(myTargetArray, " "c) ' Copies the entire source Queue to the target Array, starting ' at index 6. mySourceQ.CopyTo(myTargetArray, 6) ' Displays the values of the target Array. PrintValues(myTargetArray, " "c) ' Copies the entire source Queue to a new standard array. Dim myStandardArray As Object() = mySourceQ.ToArray() ' Displays the values of the new standard array. Console.WriteLine("The new standard array contains the following:") PrintValues(myStandardArray, " "c) End Sub Public Shared Sub PrintValues(myArr As Array, mySeparator As Char) Dim myObj As [Object] For Each myObj In myArr Console.Write("{0}{1}", mySeparator, myObj) Next myObj Console.WriteLine() End Sub 'PrintValues End Class 'SamplesQueue ' This code produces the following output. ' ' The target Array contains the following (before and after copying): ' The quick brown fox jumped over the lazy dog ' The quick brown fox jumped over three napping cats in the barn ' The new standard array contains the following: ' three napping cats in the barn
using System; using System.Collections; public class SamplesQueue { public static void Main() { // Creates and initializes the source Queue. Queue mySourceQ = new Queue(); mySourceQ.Enqueue( "three" ); mySourceQ.Enqueue( "napping" ); mySourceQ.Enqueue( "cats" ); mySourceQ.Enqueue( "in" ); mySourceQ.Enqueue( "the" ); mySourceQ.Enqueue( "barn" ); // Creates and initializes the one-dimensional target Array. Array myTargetArray=Array.CreateInstance( typeof(String), 15 ); myTargetArray.SetValue( "The", 0 ); myTargetArray.SetValue( "quick", 1 ); myTargetArray.SetValue( "brown", 2 ); myTargetArray.SetValue( "fox", 3 ); myTargetArray.SetValue( "jumped", 4 ); myTargetArray.SetValue( "over", 5 ); myTargetArray.SetValue( "the", 6 ); myTargetArray.SetValue( "lazy", 7 ); myTargetArray.SetValue( "dog", 8 ); // Displays the values of the target Array. Console.WriteLine( "The target Array contains the following (before and after copying):" ); PrintValues( myTargetArray, ' ' ); // Copies the entire source Queue to the target Array, starting at index 6. mySourceQ.CopyTo( myTargetArray, 6 ); // Displays the values of the target Array. PrintValues( myTargetArray, ' ' ); // Copies the entire source Queue to a new standard array. Object[] myStandardArray = mySourceQ.ToArray(); // Displays the values of the new standard array. Console.WriteLine( "The new standard array contains the following:" ); PrintValues( myStandardArray, ' ' ); } public static void PrintValues( Array myArr, char mySeparator ) { foreach ( Object myObj in myArr ) { Console.Write( "{0}{1}", mySeparator, myObj ); } Console.WriteLine(); } } /* This code produces the following output. The target Array contains the following (before and after copying): The quick brown fox jumped over the lazy dog The quick brown fox jumped over three napping cats in the barn The new standard array contains the following: three napping cats in the barn */
using namespace System; using namespace System::Collections; void PrintValues( Array^ myArr, char mySeparator ); int main() { // Creates and initializes the source Queue. Queue^ mySourceQ = gcnew Queue; mySourceQ->Enqueue( "three" ); mySourceQ->Enqueue( "napping" ); mySourceQ->Enqueue( "cats" ); mySourceQ->Enqueue( "in" ); mySourceQ->Enqueue( "the" ); mySourceQ->Enqueue( "barn" ); // Creates and initializes the one-dimensional target Array. Array^ myTargetArray = Array::CreateInstance( String::typeid, 15 ); myTargetArray->SetValue( "The", 0 ); myTargetArray->SetValue( "quick", 1 ); myTargetArray->SetValue( "brown", 2 ); myTargetArray->SetValue( "fox", 3 ); myTargetArray->SetValue( "jumped", 4 ); myTargetArray->SetValue( "over", 5 ); myTargetArray->SetValue( "the", 6 ); myTargetArray->SetValue( "lazy", 7 ); myTargetArray->SetValue( "dog", 8 ); // Displays the values of the target Array. Console::WriteLine( "The target Array contains the following (before and after copying):" ); PrintValues( myTargetArray, ' ' ); // Copies the entire source Queue to the target Array, starting at index 6. mySourceQ->CopyTo( myTargetArray, 6 ); // Displays the values of the target Array. PrintValues( myTargetArray, ' ' ); // Copies the entire source Queue to a new standard array. array<Object^>^myStandardArray = mySourceQ->ToArray(); // Displays the values of the new standard array. Console::WriteLine( "The new standard array contains the following:" ); PrintValues( myStandardArray, ' ' ); } void PrintValues( Array^ myArr, char mySeparator ) { IEnumerator^ myEnum = myArr->GetEnumerator(); while ( myEnum->MoveNext() ) { Object^ myObj = safe_cast<Object^>(myEnum->Current); Console::Write( "{0}{1}", mySeparator, myObj ); } Console::WriteLine(); } /* This code produces the following output. The target Array contains the following (before and after copying): The quick brown fox jumped over the lazy dog The quick brown fox jumped over three napping cats in the barn The new standard array contains the following: three napping cats in the barn */
import System.*; import System.Collections.*; public class SamplesQueue { public static void main(String[] args) { // Creates and initializes the source Queue. Queue mySourceQ = new Queue(); mySourceQ.Enqueue("three"); mySourceQ.Enqueue("napping"); mySourceQ.Enqueue("cats"); mySourceQ.Enqueue("in"); mySourceQ.Enqueue("the"); mySourceQ.Enqueue("barn"); // Creates and initializes the one-dimensional target Array. Array myTargetArray = Array.CreateInstance(String.class.ToType(), 15); myTargetArray.SetValue("The", 0); myTargetArray.SetValue("quick", 1); myTargetArray.SetValue("brown", 2); myTargetArray.SetValue("fox", 3); myTargetArray.SetValue("jumped", 4); myTargetArray.SetValue("over", 5); myTargetArray.SetValue("the", 6); myTargetArray.SetValue("lazy", 7); myTargetArray.SetValue("dog", 8); // Displays the values of the target Array. Console.WriteLine("The target Array contains the following" + " (before and after copying):"); PrintValues(myTargetArray, ' '); // Copies the entire source Queue to the target Array, // starting at index 6. mySourceQ.CopyTo(myTargetArray, 6); // Displays the values of the target Array. PrintValues(myTargetArray, ' '); // Copies the entire source Queue to a new standard array. Object myStandardArray[] = mySourceQ.ToArray(); // Displays the values of the new standard array. Console.WriteLine("The new standard array contains the following:"); PrintValues(myStandardArray, ' '); } //main public static void PrintValues(Array myArr, char mySeparator) { IEnumerator e = myArr.GetEnumerator(); while(e.MoveNext()) { Object myObj = e.get_Current(); Console.Write("{0}{1}", System.Convert.ToString(mySeparator) , System.Convert.ToString( myObj)); } Console.WriteLine(); } //PrintValues } //SamplesQueue /* This code produces the following output. The target Array contains the following (before and after copying): The quick brown fox jumped over the lazy dog The quick brown fox jumped over three napping cats in the barn The new standard array contains the following: three napping cats in the barn */

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。


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