ArrayList.Sort Méthode
Définition
Important
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Trie les éléments dans ArrayList ou une partie de celui-ci.
Surcharges
Sort() |
Trie les éléments dans l’intégralité de ArrayList. |
Sort(IComparer) |
Trie les éléments dans l'ensemble de ArrayList à l'aide du comparateur spécifié. |
Sort(Int32, Int32, IComparer) |
Trie les éléments dans une plage d'éléments de ArrayList à l'aide du comparateur spécifié. |
Sort()
- Source:
- ArrayList.cs
- Source:
- ArrayList.cs
- Source:
- ArrayList.cs
Trie les éléments dans l’intégralité de ArrayList.
public:
virtual void Sort();
public virtual void Sort ();
abstract member Sort : unit -> unit
override this.Sort : unit -> unit
Public Overridable Sub Sort ()
Exceptions
ArrayList est en lecture seule.
Exemples
L’exemple de code suivant montre comment trier les valeurs dans un ArrayList.
using namespace System;
using namespace System::Collections;
void PrintValues( IEnumerable^ myList );
int main()
{
// Creates and initializes a new ArrayList.
ArrayList^ myAL = gcnew ArrayList;
myAL->Add( "The" );
myAL->Add( "quick" );
myAL->Add( "brown" );
myAL->Add( "fox" );
myAL->Add( "jumps" );
myAL->Add( "over" );
myAL->Add( "the" );
myAL->Add( "lazy" );
myAL->Add( "dog" );
// Displays the values of the ArrayList.
Console::WriteLine( "The ArrayList initially contains the following values:" );
PrintValues( myAL );
// Sorts the values of the ArrayList.
myAL->Sort();
// Displays the values of the ArrayList.
Console::WriteLine( "After sorting:" );
PrintValues( myAL );
}
void PrintValues( IEnumerable^ myList )
{
IEnumerator^ myEnum = myList->GetEnumerator();
while ( myEnum->MoveNext() )
{
Object^ obj = safe_cast<Object^>(myEnum->Current);
Console::WriteLine( " {0}", obj );
}
Console::WriteLine();
}
/*
This code produces the following output.
The ArrayList initially contains the following values:
The
quick
brown
fox
jumps
over
the
lazy
dog
After sorting:
brown
dog
fox
jumps
lazy
over
quick
the
The
*/
using System;
using System.Collections;
public class SamplesArrayList1
{
public static void Main()
{
// Creates and initializes a new ArrayList.
ArrayList myAL = new ArrayList();
myAL.Add("The");
myAL.Add("quick");
myAL.Add("brown");
myAL.Add("fox");
myAL.Add("jumps");
myAL.Add("over");
myAL.Add("the");
myAL.Add("lazy");
myAL.Add("dog");
// Displays the values of the ArrayList.
Console.WriteLine("The ArrayList initially contains the following values:");
PrintValues(myAL);
// Sorts the values of the ArrayList.
myAL.Sort();
// Displays the values of the ArrayList.
Console.WriteLine("After sorting:");
PrintValues(myAL);
}
public static void PrintValues(IEnumerable myList)
{
foreach (Object obj in myList)
Console.WriteLine(" {0}", obj);
Console.WriteLine();
}
}
/*
This code produces the following output.
The ArrayList initially contains the following values:
The
quick
brown
fox
jumps
over
the
lazy
dog
After sorting:
brown
dog
fox
jumps
lazy
over
quick
the
The
*/
Imports System.Collections
Public Class SamplesArrayList
Public Shared Sub Main()
' Creates and initializes a new ArrayList.
Dim myAL As New ArrayList()
myAL.Add("The")
myAL.Add("quick")
myAL.Add("brown")
myAL.Add("fox")
myAL.Add("jumps")
myAL.Add("over")
myAL.Add("the")
myAL.Add("lazy")
myAL.Add("dog")
' Displays the values of the ArrayList.
Console.WriteLine("The ArrayList initially contains the following values:")
PrintValues(myAL)
' Sorts the values of the ArrayList.
myAL.Sort()
' Displays the values of the ArrayList.
Console.WriteLine("After sorting:")
PrintValues(myAL)
End Sub
Public Shared Sub PrintValues(myList As IEnumerable)
Dim obj As [Object]
For Each obj In myList
Console.WriteLine(" {0}", obj)
Next obj
Console.WriteLine()
End Sub
End Class
' This code produces the following output.
'
' The ArrayList initially contains the following values:
' The
' quick
' brown
' fox
' jumps
' over
' the
' lazy
' dog
'
' After sorting:
' brown
' dog
' fox
' jumps
' lazy
' over
' quick
' the
' The
Remarques
Cette méthode utilise Array.Sort, qui utilise l’algorithme QuickSort. L’algorithme QuickSort est un tri de comparaison (également appelé tri instable), ce qui signifie qu’une opération de comparaison « inférieure ou égale à » détermine lequel des deux éléments doit se produire en premier dans la liste triée finale. Toutefois, si deux éléments sont égaux, leur ordre d’origine peut ne pas être conservé. En revanche, un tri stable conserve l’ordre des éléments qui sont égaux. Pour effectuer un tri stable, vous devez implémenter une interface personnalisée IComparer à utiliser avec les autres surcharges de cette méthode.
En moyenne, cette méthode est une O(n log n)
opération, où n
est Count; dans le pire des cas, il s’agit d’une O(n^2)
opération.
Voir aussi
S’applique à
Sort(IComparer)
- Source:
- ArrayList.cs
- Source:
- ArrayList.cs
- Source:
- ArrayList.cs
Trie les éléments dans l'ensemble de ArrayList à l'aide du comparateur spécifié.
public:
virtual void Sort(System::Collections::IComparer ^ comparer);
public virtual void Sort (System.Collections.IComparer comparer);
public virtual void Sort (System.Collections.IComparer? comparer);
abstract member Sort : System.Collections.IComparer -> unit
override this.Sort : System.Collections.IComparer -> unit
Public Overridable Sub Sort (comparer As IComparer)
Paramètres
- comparer
- IComparer
Implémentation de IComparer à utiliser pendant la comparaison d’éléments.
- ou -
Référence null (Nothing
en Visual Basic) pour utiliser l’implémentation IComparable de chaque élément.
Exceptions
ArrayList est en lecture seule.
Une erreur s’est produite pendant la comparaison de deux éléments.
null
est passé pour comparer
, et les éléments de la liste n’implémentent pas IComparable.
Exemples
L’exemple de code suivant montre comment trier les valeurs dans un ArrayList à l’aide du comparateur par défaut et d’un comparateur personnalisé qui inverse l’ordre de tri.
using namespace System;
using namespace System::Collections;
void PrintIndexAndValues( IEnumerable^ myList );
ref class myReverserClass: public IComparer
{
private:
// Calls CaseInsensitiveComparer.Compare with the parameters reversed.
virtual int Compare( Object^ x, Object^ y ) sealed = IComparer::Compare
{
return ((gcnew CaseInsensitiveComparer)->Compare( y, x ));
}
};
int main()
{
// Creates and initializes a new ArrayList.
ArrayList^ myAL = gcnew ArrayList;
myAL->Add( "The" );
myAL->Add( "quick" );
myAL->Add( "brown" );
myAL->Add( "fox" );
myAL->Add( "jumps" );
myAL->Add( "over" );
myAL->Add( "the" );
myAL->Add( "lazy" );
myAL->Add( "dog" );
// Displays the values of the ArrayList.
Console::WriteLine( "The ArrayList initially contains the following values:" );
PrintIndexAndValues( myAL );
// Sorts the values of the ArrayList using the default comparer.
myAL->Sort();
Console::WriteLine( "After sorting with the default comparer:" );
PrintIndexAndValues( myAL );
// Sorts the values of the ArrayList using the reverse case-insensitive comparer.
IComparer^ myComparer = gcnew myReverserClass;
myAL->Sort( myComparer );
Console::WriteLine( "After sorting with the reverse case-insensitive comparer:" );
PrintIndexAndValues( myAL );
}
void PrintIndexAndValues( IEnumerable^ myList )
{
int i = 0;
IEnumerator^ myEnum = myList->GetEnumerator();
while ( myEnum->MoveNext() )
{
Object^ obj = safe_cast<Object^>(myEnum->Current);
Console::WriteLine( "\t[{0}]:\t{1}", i++, obj );
}
Console::WriteLine();
}
/*
This code produces the following output.
The ArrayList initially contains the following values:
[0]: The
[1]: quick
[2]: brown
[3]: fox
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
After sorting with the default comparer:
[0]: brown
[1]: dog
[2]: fox
[3]: jumps
[4]: lazy
[5]: over
[6]: quick
[7]: the
[8]: The
After sorting with the reverse case-insensitive comparer:
[0]: the
[1]: The
[2]: quick
[3]: over
[4]: lazy
[5]: jumps
[6]: fox
[7]: dog
[8]: brown
*/
using System;
using System.Collections;
public class SamplesArrayList2
{
public class myReverserClass : IComparer
{
// Calls CaseInsensitiveComparer.Compare with the parameters reversed.
int IComparer.Compare(Object x, Object y)
{
return ((new CaseInsensitiveComparer()).Compare(y, x));
}
}
public static void Main()
{
// Creates and initializes a new ArrayList.
ArrayList myAL = new ArrayList();
myAL.Add("The");
myAL.Add("quick");
myAL.Add("brown");
myAL.Add("fox");
myAL.Add("jumps");
myAL.Add("over");
myAL.Add("the");
myAL.Add("lazy");
myAL.Add("dog");
// Displays the values of the ArrayList.
Console.WriteLine("The ArrayList initially contains the following values:");
PrintIndexAndValues(myAL);
// Sorts the values of the ArrayList using the default comparer.
myAL.Sort();
Console.WriteLine("After sorting with the default comparer:");
PrintIndexAndValues(myAL);
// Sorts the values of the ArrayList using the reverse case-insensitive comparer.
IComparer myComparer = new myReverserClass();
myAL.Sort(myComparer);
Console.WriteLine("After sorting with the reverse case-insensitive comparer:");
PrintIndexAndValues(myAL);
}
public static void PrintIndexAndValues(IEnumerable myList)
{
int i = 0;
foreach (Object obj in myList)
Console.WriteLine("\t[{0}]:\t{1}", i++, obj);
Console.WriteLine();
}
}
/*
This code produces the following output.
The ArrayList initially contains the following values:
[0]: The
[1]: quick
[2]: brown
[3]: fox
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
After sorting with the default comparer:
[0]: brown
[1]: dog
[2]: fox
[3]: jumps
[4]: lazy
[5]: over
[6]: quick
[7]: the
[8]: The
After sorting with the reverse case-insensitive comparer:
[0]: the
[1]: The
[2]: quick
[3]: over
[4]: lazy
[5]: jumps
[6]: fox
[7]: dog
[8]: brown
*/
Imports System.Collections
Public Class SamplesArrayList
Public Class myReverserClass
Implements IComparer
' Calls CaseInsensitiveComparer.Compare with the parameters reversed.
Public Function Compare( ByVal x As Object, ByVal y As Object) As Integer _
Implements IComparer.Compare
Return New CaseInsensitiveComparer().Compare(y, x)
End Function 'IComparer.Compare
End Class
Public Shared Sub Main()
' Creates and initializes a new ArrayList.
Dim myAL As New ArrayList()
myAL.Add("The")
myAL.Add("quick")
myAL.Add("brown")
myAL.Add("fox")
myAL.Add("jumps")
myAL.Add("over")
myAL.Add("the")
myAL.Add("lazy")
myAL.Add("dog")
' Displays the values of the ArrayList.
Console.WriteLine("The ArrayList initially contains the following values:")
PrintIndexAndValues(myAL)
' Sorts the values of the ArrayList using the default comparer.
myAL.Sort()
Console.WriteLine("After sorting with the default comparer:")
PrintIndexAndValues(myAL)
' Sorts the values of the ArrayList using the reverse case-insensitive comparer.
Dim myComparer = New myReverserClass()
myAL.Sort(myComparer)
Console.WriteLine("After sorting with the reverse case-insensitive comparer:")
PrintIndexAndValues(myAL)
End Sub
Public Shared Sub PrintIndexAndValues(myList As IEnumerable)
Dim i As Integer = 0
Dim obj As [Object]
For Each obj In myList
Console.WriteLine(vbTab + "[{0}]:" + vbTab + "{1}", i, obj)
i = i + 1
Next obj
Console.WriteLine()
End Sub
End Class
'This code produces the following output.
'The ArrayList initially contains the following values:
' [0]: The
' [1]: quick
' [2]: brown
' [3]: fox
' [4]: jumps
' [5]: over
' [6]: the
' [7]: lazy
' [8]: dog
'
'After sorting with the default comparer:
' [0]: brown
' [1]: dog
' [2]: fox
' [3]: jumps
' [4]: lazy
' [5]: over
' [6]: quick
' [7]: the
' [8]: The
'
'After sorting with the reverse case-insensitive comparer:
' [0]: the
' [1]: The
' [2]: quick
' [3]: over
' [4]: lazy
' [5]: jumps
' [6]: fox
' [7]: dog
' [8]: brown
Remarques
Utilisez la Sort méthode pour trier une liste d’objets avec un comparateur personnalisé qui implémente l’interface IComparer . Si vous passez null
pour comparer
, cette méthode utilise l’implémentation IComparable de chaque élément. Dans ce cas, vous devez vous assurer que les objets contenus dans la liste implémentent l’interface IComparer , sinon une exception se produit.
En outre, l’utilisation de l’implémentation IComparable signifie que la liste effectue un tri de comparaison (également appelé tri instable) ; autrement dit, si deux éléments sont égaux, leur ordre peut ne pas être conservé. En revanche, un tri stable conserve l’ordre des éléments qui sont égaux. Pour effectuer un tri stable, vous devez implémenter une interface personnalisée IComparer .
En moyenne, cette méthode est une O(n log n)
opération, où n
est Count; dans le pire des cas, il s’agit d’une O(n^2)
opération.
Voir aussi
S’applique à
Sort(Int32, Int32, IComparer)
- Source:
- ArrayList.cs
- Source:
- ArrayList.cs
- Source:
- ArrayList.cs
Trie les éléments dans une plage d'éléments de ArrayList à l'aide du comparateur spécifié.
public:
virtual void Sort(int index, int count, System::Collections::IComparer ^ comparer);
public virtual void Sort (int index, int count, System.Collections.IComparer comparer);
public virtual void Sort (int index, int count, System.Collections.IComparer? comparer);
abstract member Sort : int * int * System.Collections.IComparer -> unit
override this.Sort : int * int * System.Collections.IComparer -> unit
Public Overridable Sub Sort (index As Integer, count As Integer, comparer As IComparer)
Paramètres
- index
- Int32
Index de début de base zéro de la plage à trier.
- count
- Int32
Longueur de la plage à trier.
- comparer
- IComparer
Implémentation de IComparer à utiliser pendant la comparaison d’éléments.
- ou -
Référence null (Nothing
en Visual Basic) pour utiliser l’implémentation IComparable de chaque élément.
Exceptions
index
et count
ne spécifient pas une plage valide dans le ArrayList.
ArrayList est en lecture seule.
Une erreur s’est produite pendant la comparaison de deux éléments.
Exemples
L’exemple de code suivant montre comment trier les valeurs d’une plage d’éléments dans un ArrayList à l’aide du comparateur par défaut et d’un comparateur personnalisé qui inverse l’ordre de tri.
using namespace System;
using namespace System::Collections;
void PrintIndexAndValues( IEnumerable^ myList );
ref class myReverserClass: public IComparer
{
private:
// Calls CaseInsensitiveComparer.Compare with the parameters reversed.
virtual int Compare( Object^ x, Object^ y ) = IComparer::Compare
{
return ((gcnew CaseInsensitiveComparer)->Compare( y, x ));
}
};
int main()
{
// Creates and initializes a new ArrayList.
ArrayList^ myAL = gcnew ArrayList;
myAL->Add( "The" );
myAL->Add( "QUICK" );
myAL->Add( "BROWN" );
myAL->Add( "FOX" );
myAL->Add( "jumps" );
myAL->Add( "over" );
myAL->Add( "the" );
myAL->Add( "lazy" );
myAL->Add( "dog" );
// Displays the values of the ArrayList.
Console::WriteLine( "The ArrayList initially contains the following values:" );
PrintIndexAndValues( myAL );
// Sorts the values of the ArrayList using the default comparer.
myAL->Sort( 1, 3, nullptr );
Console::WriteLine( "After sorting from index 1 to index 3 with the default comparer:" );
PrintIndexAndValues( myAL );
// Sorts the values of the ArrayList using the reverse case-insensitive comparer.
IComparer^ myComparer = gcnew myReverserClass;
myAL->Sort( 1, 3, myComparer );
Console::WriteLine( "After sorting from index 1 to index 3 with the reverse case-insensitive comparer:" );
PrintIndexAndValues( myAL );
}
void PrintIndexAndValues( IEnumerable^ myList )
{
int i = 0;
IEnumerator^ myEnum = myList->GetEnumerator();
while ( myEnum->MoveNext() )
{
Object^ obj = safe_cast<Object^>(myEnum->Current);
Console::WriteLine( "\t[{0}]:\t{1}", i++, obj );
}
Console::WriteLine();
}
/*
This code produces the following output.
The ArrayList initially contains the following values:
[0]: The
[1]: QUICK
[2]: BROWN
[3]: FOX
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
After sorting from index 1 to index 3 with the default comparer:
[0]: The
[1]: BROWN
[2]: FOX
[3]: QUICK
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
After sorting from index 1 to index 3 with the reverse case-insensitive comparer:
[0]: The
[1]: QUICK
[2]: FOX
[3]: BROWN
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
*/
using System;
using System.Collections;
public class SamplesArrayList3
{
public class myReverserClass : IComparer
{
// Calls CaseInsensitiveComparer.Compare with the parameters reversed.
int IComparer.Compare(Object x, Object y)
{
return ((new CaseInsensitiveComparer()).Compare(y, x));
}
}
public static void Main()
{
// Creates and initializes a new ArrayList.
ArrayList myAL = new ArrayList();
myAL.Add("The");
myAL.Add("QUICK");
myAL.Add("BROWN");
myAL.Add("FOX");
myAL.Add("jumps");
myAL.Add("over");
myAL.Add("the");
myAL.Add("lazy");
myAL.Add("dog");
// Displays the values of the ArrayList.
Console.WriteLine("The ArrayList initially contains the following values:");
PrintIndexAndValues(myAL);
// Sorts the values of the ArrayList using the default comparer.
myAL.Sort(1, 3, null);
Console.WriteLine("After sorting from index 1 to index 3 with the default comparer:");
PrintIndexAndValues(myAL);
// Sorts the values of the ArrayList using the reverse case-insensitive comparer.
IComparer myComparer = new myReverserClass();
myAL.Sort(1, 3, myComparer);
Console.WriteLine("After sorting from index 1 to index 3 with the reverse case-insensitive comparer:");
PrintIndexAndValues(myAL);
}
public static void PrintIndexAndValues(IEnumerable myList)
{
int i = 0;
foreach (Object obj in myList)
Console.WriteLine("\t[{0}]:\t{1}", i++, obj);
Console.WriteLine();
}
}
/*
This code produces the following output.
The ArrayList initially contains the following values:
[0]: The
[1]: QUICK
[2]: BROWN
[3]: FOX
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
After sorting from index 1 to index 3 with the default comparer:
[0]: The
[1]: BROWN
[2]: FOX
[3]: QUICK
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
After sorting from index 1 to index 3 with the reverse case-insensitive comparer:
[0]: The
[1]: QUICK
[2]: FOX
[3]: BROWN
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
*/
Imports System.Collections
Public Class SamplesArrayList
Public Class myReverserClass
Implements IComparer
' Calls CaseInsensitiveComparer.Compare with the parameters reversed.
Public Function Compare( ByVal x As Object, ByVal y As Object) As Integer _
Implements IComparer.Compare
Return New CaseInsensitiveComparer().Compare(y, x)
End Function 'IComparer.Compare
End Class
Public Shared Sub Main()
' Creates and initializes a new ArrayList.
Dim myAL As New ArrayList()
myAL.Add("The")
myAL.Add("QUICK")
myAL.Add("BROWN")
myAL.Add("FOX")
myAL.Add("jumps")
myAL.Add("over")
myAL.Add("the")
myAL.Add("lazy")
myAL.Add("dog")
' Displays the values of the ArrayList.
Console.WriteLine("The ArrayList initially contains the following values:")
PrintIndexAndValues(myAL)
' Sorts the values of the ArrayList using the default comparer.
myAL.Sort(1, 3, Nothing)
Console.WriteLine("After sorting from index 1 to index 3 with the default comparer:")
PrintIndexAndValues(myAL)
' Sorts the values of the ArrayList using the reverse case-insensitive comparer.
Dim myComparer = New myReverserClass()
myAL.Sort(1, 3, myComparer)
Console.WriteLine("After sorting from index 1 to index 3 with the reverse case-insensitive comparer:")
PrintIndexAndValues(myAL)
End Sub
Public Shared Sub PrintIndexAndValues(myList As IEnumerable)
Dim i As Integer = 0
Dim obj As [Object]
For Each obj In myList
Console.WriteLine(vbTab + "[{0}]:" + vbTab + "{1}", i, obj)
i = i + 1
Next obj
Console.WriteLine()
End Sub
End Class
'This code produces the following output.
'The ArrayList initially contains the following values:
' [0]: The
' [1]: QUICK
' [2]: BROWN
' [3]: FOX
' [4]: jumps
' [5]: over
' [6]: the
' [7]: lazy
' [8]: dog
'
'After sorting from index 1 to index 3 with the default comparer:
' [0]: The
' [1]: BROWN
' [2]: FOX
' [3]: QUICK
' [4]: jumps
' [5]: over
' [6]: the
' [7]: lazy
' [8]: dog
'
'After sorting from index 1 to index 3 with the reverse case-insensitive comparer:
' [0]: The
' [1]: QUICK
' [2]: FOX
' [3]: BROWN
' [4]: jumps
' [5]: over
' [6]: the
' [7]: lazy
' [8]: dog
Remarques
Si comparer
a la valeur null
, cette méthode effectue un tri de comparaison (également appelé tri instable) ; autrement dit, si deux éléments sont égaux, leur ordre peut ne pas être conservé. En revanche, un tri stable conserve l’ordre des éléments qui sont égaux. Pour effectuer un tri stable, vous devez implémenter une interface personnalisée IComparer .
En moyenne, cette méthode est une O(n log n)
opération, où n
est count
; dans le pire des cas, il s’agit d’une O(n^2)
opération.