HashSet<T>.SymmetricExceptWith(IEnumerable<T>) Metodo

Definizione

Modifica l'oggetto HashSet<T> corrente in modo che contenga solo elementi presenti in tale oggetto o nella raccolta specificata, ma non entrambi.Modifies the current HashSet<T> object to contain only elements that are present either in that object or in the specified collection, but not both.

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

Parametri

other
IEnumerable<T>

Raccolta da confrontare con l'oggetto HashSet<T> corrente.The collection to compare to the current HashSet<T> object.

Implementazioni

Attributi

Eccezioni

other è null.other is null.

Esempi

Nell'esempio seguente vengono create due raccolte HashSet<T> con set di dati sovrapposti.The following example creates two HashSet<T> collections with overlapping sets of data. Il set che contiene i valori inferiori viene quindi modificato, usando il metodo SymmetricExceptWith, per contenere solo i valori che non sono presenti in entrambi i set.The set that contains the lower values is then modified, using the SymmetricExceptWith method, to contain only the values that are not present in both sets.

HashSet<int> lowNumbers = new HashSet<int>();
HashSet<int> highNumbers = new HashSet<int>();

for (int i = 0; i < 6; i++)
{
    lowNumbers.Add(i);
}

for (int i = 3; i < 10; i++)
{
    highNumbers.Add(i);
}

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

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

Console.WriteLine("lowNumbers SymmetricExceptWith highNumbers...");
lowNumbers.SymmetricExceptWith(highNumbers);

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

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

/* This example provides output similar to the following:
* lowNumbers contains 6 elements: { 0 1 2 3 4 5 }
* highNumbers contains 7 elements: { 3 4 5 6 7 8 9 }
* lowNumbers SymmetricExceptWith highNumbers...
* lowNumbers contains 7 elements: { 0 1 2 8 7 6 9 }
*/
Shared Sub Main()

    Dim lowNumbers As HashSet(Of Integer) = New HashSet(Of Integer)()
    Dim highNumbers As HashSet(Of Integer) = New HashSet(Of Integer)()

    For i As Integer = 0 To 5
        lowNumbers.Add(i)
    Next i

    For i As Integer = 3 To 9
        highNumbers.Add(i)
    Next i

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

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

    Console.WriteLine("lowNumbers SymmetricExceptWith highNumbers...")
    lowNumbers.SymmetricExceptWith(highNumbers)

    Console.Write("lowNumbers contains {0} elements: ", lowNumbers.Count)
    DisplaySet(lowNumbers)
End Sub
' This example produces output similar to the following:
' lowNumbers contains 6 elements: { 0 1 2 3 4 5 }
' highNumbers contains 7 elements: { 3 4 5 6 7 8 9 }
' lowNumbers SymmetricExceptWith highNumbers...
' lowNumbers contains 7 elements: { 0 1 2 8 7 6 9 }

Commenti

Se il parametro other è una raccolta HashSet<T> con lo stesso operatore di confronto di uguaglianza dell'oggetto HashSet<T> corrente, questo metodo è un'operazione O (n).If the other parameter is a HashSet<T> collection with the same equality comparer as the current HashSet<T> object, this method is an O(n) operation. In caso contrario, questo metodo è un'operazione O (n @ no__t-1 @ no__t-2), dove n è il numero di elementi in other e m è Count.Otherwise, this method is an O(n + m) operation, where n is the number of elements in other and m is Count.

Si applica a