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

定義

命名空間:

System.Collections.Generic

組件:

System.Collections.dll

來源:

HashSet.cs

修改目前的 HashSet<T> 物件，以便僅包含該物件或指定之集合 (但非兩者) 中出現的項目。

public:
 virtual void SymmetricExceptWith(System::Collections::Generic::IEnumerable<T> ^ other);

public void SymmetricExceptWith (System.Collections.Generic.IEnumerable<T> other);

abstract member SymmetricExceptWith : seq<'T> -> unit
override this.SymmetricExceptWith : seq<'T> -> unit

Public Sub SymmetricExceptWith (other As IEnumerable(Of T))

參數

other

IEnumerable<T>

要與目前 HashSet<T> 物件比較的集合。

實作

SymmetricExceptWith(IEnumerable<T>)

例外狀況

ArgumentNullException

other 為 null。

範例

下列範例會建立兩 HashSet<T> 個具有重疊數據集的集合。 接著，使用 SymmetricExceptWith 方法修改包含較低值的集合，只包含兩個集合中不存在的值。

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 }

備註

other如果 參數是HashSet<T>與目前 HashSet<T> 物件相同的相等比較子集合，這個方法是 O (n) 作業。 否則，這個方法是 O (n + m) 作業，其中 是中的other元素數目，而 nm 是 。Count