HashSet<T>.SymmetricExceptWith(IEnumerable<T>) Method
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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:
virtual void SymmetricExceptWith(System::Collections::Generic::IEnumerable<T> ^ other);
public:
void SymmetricExceptWith(System::Collections::Generic::IEnumerable<T> ^ other);
public void SymmetricExceptWith (System.Collections.Generic.IEnumerable<T> other);
[System.Security.SecurityCritical]
public void SymmetricExceptWith (System.Collections.Generic.IEnumerable<T> other);
abstract member SymmetricExceptWith : seq<'T> -> unit
override this.SymmetricExceptWith : seq<'T> -> unit
[<System.Security.SecurityCritical>]
member this.SymmetricExceptWith : seq<'T> -> unit
[<System.Security.SecurityCritical>]
abstract member SymmetricExceptWith : seq<'T> -> unit
override this.SymmetricExceptWith : seq<'T> -> unit
Public Sub SymmetricExceptWith (other As IEnumerable(Of T))
- other
- IEnumerable<T>
The collection to compare to the current HashSet<T> object.
- Attributes
other
is null
.
The following example creates two HashSet<T> collections with overlapping sets of data. 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 }
*/
let displaySet (set: HashSet<int>) =
printf "{"
for i in set do
printf $" {i}"
printfn " }"
let lowNumbers = HashSet<int>()
let highNumbers = HashSet<int>()
for i in 0..5 do
lowNumbers.Add i |> ignore
for i in 3..9 do
highNumbers.Add i |> ignore
printf $"lowNumbers contains {lowNumbers.Count} elements: "
displaySet lowNumbers
printf $"highNumbers contains {highNumbers.Count} elements: "
displaySet highNumbers
printfn "lowNumbers SymmetricExceptWith highNumbers..."
lowNumbers.SymmetricExceptWith highNumbers
printf $"lowNumbers contains {lowNumbers.Count} elements: "
displaySet lowNumbers
// 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 }
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. Otherwise, this method is an O(n
+ m
) operation, where n
is the number of elements in other
and m
is Count.
Product | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1 |
UWP | 10.0 |
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