HashSet(T) Class Represents a set of values. : HashSet « Data Structure « VB.Net






  1. VB.Net
  2. Data Structure
  3. HashSet

HashSet(T) Class Represents a set of values.

 

Imports System
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
            evenNumbers.Add(i * 2)
            oddNumbers.Add((i * 2) + 1)
        Next i

        Console.Write(evenNumbers.Count)
        DisplaySet(evenNumbers)

        Console.Write(oddNumbers.Count)
        DisplaySet(oddNumbers)

        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))
        For Each i As Integer In coll
            Console.WriteLine(" {0}", i)
        Next i
    End Sub

End Class








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1.KeyedCollection(TKey, TItem) is the abstract base class for a collection whose keys are embedded in the values.
2.Lookup(TKey, TElement) Represents a collection of keys each mapped to one or more values.
3.ReadOnlyCollection(T) Class Provides the base class for a generic read-only collection.
4.Create a HashSet from another HashSet
5.Create HashSet(Of T) class that uses the default equality comparer for the set type
6.Create HashSet(Of T) class from another collection
7.Remove element from HashSet with condition function
8.HashSet(T).Clear Method removes all elements from a HashSet(Of T) object.
9.HashSet(T).Contains Method tells whether a HashSet(Of T) object contains the specified element.
10.HashSet(T).ExceptWith Method removes all elements in the specified collection from the current HashSet(Of T) object.
11.HashSet(T).IsProperSubsetOf Method tells whether a HashSet(Of T) object is a proper subset of the specified collection.
12.HashSet(T).SymmetricExceptWith Method keeps elements that are present either in that object or in the specified collection, but not both.