ParallelEnumerable.OrderByDescending Method
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Sorts the elements of a sequence in descending order.
| OrderByDescending<TSource,TKey>(ParallelQuery<TSource>, Func<TSource,TKey>) |
Sorts in parallel the elements of a sequence in descending order according to a key. |
| OrderByDescending<TSource,TKey>(ParallelQuery<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Sorts the elements of a sequence in descending order by using a specified comparer. |
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Sorts in parallel the elements of a sequence in descending order according to a key.
public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
static System::Linq::OrderedParallelQuery<TSource> ^ OrderByDescending(System::Linq::ParallelQuery<TSource> ^ source, Func<TSource, TKey> ^ keySelector);public static System.Linq.OrderedParallelQuery<TSource> OrderByDescending<TSource,TKey>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,TKey> keySelector);static member OrderByDescending : System.Linq.ParallelQuery<'Source> * Func<'Source, 'Key> -> System.Linq.OrderedParallelQuery<'Source><Extension()>
Public Function OrderByDescending(Of TSource, TKey) (source As ParallelQuery(Of TSource), keySelector As Func(Of TSource, TKey)) As OrderedParallelQuery(Of TSource)Type Parameters
- TSource
The type of elements of source.
- TKey
The type of the key returned by keySelector.
Parameters
- source
- ParallelQuery<TSource>
A sequence of values to order.
- keySelector
- Func<TSource,TKey>
A function to extract a key from an element.
Returns
An OrderedParallelQuery{TSource} whose elements are sorted descending according to a key.
Exceptions
source or keySelector is a null reference (Nothing in Visual Basic).
The query was canceled with the token passed in through WithCancellation<TSource>(ParallelQuery<TSource>, CancellationToken).
One or more exceptions occurred during the evaluation of the query.
Remarks
In contrast to the sequential implementation, this is not a stable sort. See the remarks for OrderBy for an approach to implementing a stable sort.
See also
Applies to
.NET 10 and other versions
| 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, 10 |
| .NET Framework | 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 | 2.0, 2.1 |
| UWP | 10.0 |
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Sorts the elements of a sequence in descending order by using a specified comparer.
public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
static System::Linq::OrderedParallelQuery<TSource> ^ OrderByDescending(System::Linq::ParallelQuery<TSource> ^ source, Func<TSource, TKey> ^ keySelector, System::Collections::Generic::IComparer<TKey> ^ comparer);public static System.Linq.OrderedParallelQuery<TSource> OrderByDescending<TSource,TKey>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer);public static System.Linq.OrderedParallelQuery<TSource> OrderByDescending<TSource,TKey>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IComparer<TKey>? comparer);static member OrderByDescending : System.Linq.ParallelQuery<'Source> * Func<'Source, 'Key> * System.Collections.Generic.IComparer<'Key> -> System.Linq.OrderedParallelQuery<'Source><Extension()>
Public Function OrderByDescending(Of TSource, TKey) (source As ParallelQuery(Of TSource), keySelector As Func(Of TSource, TKey), comparer As IComparer(Of TKey)) As OrderedParallelQuery(Of TSource)Type Parameters
- TSource
The type of elements of source.
- TKey
The type of the key returned by keySelector.
Parameters
- source
- ParallelQuery<TSource>
A sequence of values to order.
- keySelector
- Func<TSource,TKey>
A function to extract a key from an element.
- comparer
- IComparer<TKey>
An IComparer{TKey} to compare keys.
Returns
An OrderedParallelQuery{TSource} whose elements are sorted descending according to a key.
Exceptions
source or keySelector is a null reference (Nothing in Visual Basic).
The query was canceled with the token passed in through WithCancellation<TSource>(ParallelQuery<TSource>, CancellationToken).
One or more exceptions occurred during the evaluation of the query.
Remarks
In contrast to the sequential implementation, this is not a stable sort. See the remarks for OrderBy for an approach to implementing a stable sort.
See also
Applies to
.NET 10 and other versions
| 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, 10 |
| .NET Framework | 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 | 2.0, 2.1 |
| UWP | 10.0 |
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