HashSet<T>.UnionWith(IEnumerable<T>) HashSet<T>.UnionWith(IEnumerable<T>) HashSet<T>.UnionWith(IEnumerable<T>) HashSet<T>.UnionWith(IEnumerable<T>) Method

Définition

Modifie l'objet HashSet<T> actif afin qu'il contienne tous les éléments qui sont présents à la fois dans cet objet et dans la collection spécifiée.Modifies the current HashSet<T> object to contain all elements that are present in itself, the specified collection, or both.

public:
 void UnionWith(System::Collections::Generic::IEnumerable<T> ^ other);
public void UnionWith (System.Collections.Generic.IEnumerable<T> other);
member this.UnionWith : seq<'T> -> unit
Public Sub UnionWith (other As IEnumerable(Of T))

Paramètres

other
IEnumerable<T> IEnumerable<T> IEnumerable<T> IEnumerable<T>

Collection à comparer à l'objet HashSet<T> actif.The collection to compare to the current HashSet<T> object.

Implémente

Exceptions

Exemples

L’exemple suivant montre comment fusionner deux jeux disparates.The following example demonstrates how to merge two disparate sets. Cet exemple crée deux HashSet<T> objets et les remplit avec des nombres pairs et impairs, respectivement.This example creates two HashSet<T> objects, and populates them with even and odd numbers, respectively. Un troisième HashSet<T> objet est créé à partir de l’ensemble qui contient les nombres pairs.A third HashSet<T> object is created from the set that contains the even numbers. L’exemple appelle ensuite la UnionWith méthode, qui ajoute le nombre impair au troisième jeu.The example then calls the UnionWith method, which adds the odd number set to the third set.

HashSet<int> evenNumbers = new HashSet<int>();
HashSet<int> oddNumbers = new HashSet<int>();

for (int i = 0; i < 5; i++)
{
    // Populate numbers with just even numbers.
    evenNumbers.Add(i * 2);

    // Populate oddNumbers with just odd numbers.
    oddNumbers.Add((i * 2) + 1);
}

Console.Write("evenNumbers contains {0} elements: ", evenNumbers.Count);
DisplaySet(evenNumbers);

Console.Write("oddNumbers contains {0} elements: ", oddNumbers.Count);
DisplaySet(oddNumbers);

// Create a new HashSet populated with even numbers.
HashSet<int> numbers = new HashSet<int>(evenNumbers);
Console.WriteLine("numbers UnionWith oddNumbers...");
numbers.UnionWith(oddNumbers);

Console.Write("numbers contains {0} elements: ", numbers.Count);
DisplaySet(numbers);

void DisplaySet(HashSet<int> set)
{
    Console.Write("{");
    foreach (int i in set)
    {
        Console.Write(" {0}", i);
    }
    Console.WriteLine(" }");
}

/* This example produces output similar to the following:
* evenNumbers contains 5 elements: { 0 2 4 6 8 }
* oddNumbers contains 5 elements: { 1 3 5 7 9 }
* numbers UnionWith oddNumbers...
* numbers contains 10 elements: { 0 2 4 6 8 1 3 5 7 9 }
*/
Imports System.Collections.Generic

Class Program

    Shared Sub Main()

        Dim evenNumbers As HashSet(Of Integer) = New HashSet(Of Integer)()
        Dim oddNumbers As HashSet(Of Integer) = New HashSet(Of Integer)()

        For i As Integer = 0 To 4

            ' Populate evenNumbers with only even numbers.
            evenNumbers.Add(i * 2)

            ' Populate oddNumbers with only odd numbers.
            oddNumbers.Add((i * 2) + 1)
        Next i

        Console.Write("evenNumbers contains {0} elements: ", evenNumbers.Count)
        DisplaySet(evenNumbers)

        Console.Write("oddNumbers contains {0} elements: ", oddNumbers.Count)
        DisplaySet(oddNumbers)

        ' Create a new HashSet populated with even numbers.
        Dim numbers As HashSet(Of Integer) = New HashSet(Of Integer)(evenNumbers)
        Console.WriteLine("numbers UnionWith oddNumbers...")
        numbers.UnionWith(oddNumbers)

        Console.Write("numbers contains {0} elements: ", numbers.Count)
        DisplaySet(numbers)
    End Sub


    Private Shared Sub DisplaySet(ByVal coll As HashSet(Of Integer))
        Console.Write("{")
        For Each i As Integer In coll
            Console.Write(" {0}", i)
        Next i
        Console.WriteLine(" }")
    End Sub

End Class
' This example produces output similar to the following:
' evenNumbers contains 5 elements: { 0 2 4 6 8 }
' oddNumbers contains 5 elements: { 1 3 5 7 9 }
' numbers UnionWith oddNumbers...
' numbers contains 10 elements: { 0 2 4 6 8 1 3 5 7 9 }

Remarques

Cette méthode est une opération On(), où n est le nombre d’éléments dans le other paramètre.This method is an O(n) operation, where n is the number of elements in the other parameter.

S’applique à