HashSet<T>.Count Özellik

Tanım

Bir küme içinde bulunan öğelerin sayısını alır.Gets the number of elements that are contained in a set.

public:
 property int Count { int get(); };
public int Count { get; }
member this.Count : int
Public ReadOnly Property Count As Integer

Özellik Değeri

Int32

Küme içinde bulunan öğelerin sayısı.The number of elements that are contained in the set.

Uygulamalar

Örnekler

Aşağıdaki örnek, iki nesnenin nasıl oluşturulduğunu, doldurulacağını ve değiştirileceğini gösterir HashSet<T> .The following example demonstrates how to create, populate, and manipulate two HashSet<T> objects. Bu örnekte, hem küme içeriği hem de Count konsola görüntülenir.In this example, both the contents of the set and Count display to the console.

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 }

Açıklamalar

Bir HashSet<T> nesnenin kapasitesi nesnenin tutabileceğinden öğe sayısıdır.The capacity of a HashSet<T> object is the number of elements that the object can hold. Nesneye HashSet<T> öğe eklendikçe nesnenin kapasitesi otomatik olarak artar.A HashSet<T> object's capacity automatically increases as elements are added to the object.

Kapasite her zaman büyüktür veya eşittir Count .The capacity is always greater than or equal to Count. CountÖğe eklenirken kapasiteyi aşarsa, kapasite önceki kapasitenin iki katına daha büyük olan ilk asal sayı olarak ayarlanır.If Count exceeds the capacity while adding elements, the capacity is set to the first prime number that is greater than double the previous capacity.

Bu özelliğin değerini almak bir O(1) işlemidir.Retrieving the value of this property is an O(1) operation.

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