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

정의

네임스페이스:

System.Collections.Generic

어셈블리:

System.Collections.dll

Source:

HashSet.cs

현재 HashSet<T> 개체를 수정하여 해당 개체와 지정된 컬렉션에 있는 모든 요소를 포함시킵니다.

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

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

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

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

매개 변수

other

IEnumerable<T>

현재 HashSet<T> 개체와 비교할 컬렉션입니다.

구현

UnionWith(IEnumerable<T>)

예외

ArgumentNullException

other이(가) null인 경우

예제

다음 예제에서는 서로 다른 두 집합을 병합하는 방법을 보여 줍니다. 이 예제에서는 두 HashSet<T> 개의 개체를 만들고 각각 짝수 및 홀수로 채웁니다. 세 번째 HashSet<T> 개체는 짝수를 포함하는 집합에서 만들어집니다. 그런 다음, 메서드를 UnionWith 호출하여 세 번째 집합에 홀수 집합을 추가합니다.

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> collection)
{
    Console.Write("{");
    foreach (int i in collection)
    {
        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 collection As HashSet(Of Integer))
        Console.Write("{")
        For Each i As Integer In collection
            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 }

설명

이 메서드는 O(n) 작업입니다. 여기서 n 은 매개 변수의 요소 other 수입니다.