ParallelEnumerable.ThenByDescending Method
Definition
Important
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Performs in parallel a subsequent ordering of the elements in a sequence in descending order.
Overloads
| ThenByDescending<TSource,TKey>(OrderedParallelQuery<TSource>, Func<TSource,TKey>) |
Performs in parallel a subsequent ordering of the elements in a sequence in descending order, according to a key. |
| ThenByDescending<TSource,TKey>(OrderedParallelQuery<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Performs in parallel a subsequent ordering of the elements in a sequence in descending order by using a specified comparer. |
ThenByDescending<TSource,TKey>(OrderedParallelQuery<TSource>, Func<TSource,TKey>)
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Performs in parallel a subsequent ordering of the elements in a sequence in descending order, according to a key.
public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
static System::Linq::OrderedParallelQuery<TSource> ^ ThenByDescending(System::Linq::OrderedParallelQuery<TSource> ^ source, Func<TSource, TKey> ^ keySelector);public static System.Linq.OrderedParallelQuery<TSource> ThenByDescending<TSource,TKey> (this System.Linq.OrderedParallelQuery<TSource> source, Func<TSource,TKey> keySelector);static member ThenByDescending : System.Linq.OrderedParallelQuery<'Source> * Func<'Source, 'Key> -> System.Linq.OrderedParallelQuery<'Source><Extension()>
Public Function ThenByDescending(Of TSource, TKey) (source As OrderedParallelQuery(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
An OrderedParallelQuery{TSource} that contains elements to sort.
- keySelector
- Func<TSource,TKey>
A function to extract a key from an element.
Returns
A sequence 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
ThenByDescending<TSource,TKey>(OrderedParallelQuery<TSource>, Func<TSource,TKey>, IComparer<TKey>)
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Performs in parallel a subsequent ordering of the elements in 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> ^ ThenByDescending(System::Linq::OrderedParallelQuery<TSource> ^ source, Func<TSource, TKey> ^ keySelector, System::Collections::Generic::IComparer<TKey> ^ comparer);public static System.Linq.OrderedParallelQuery<TSource> ThenByDescending<TSource,TKey> (this System.Linq.OrderedParallelQuery<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer);public static System.Linq.OrderedParallelQuery<TSource> ThenByDescending<TSource,TKey> (this System.Linq.OrderedParallelQuery<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IComparer<TKey>? comparer);static member ThenByDescending : System.Linq.OrderedParallelQuery<'Source> * Func<'Source, 'Key> * System.Collections.Generic.IComparer<'Key> -> System.Linq.OrderedParallelQuery<'Source><Extension()>
Public Function ThenByDescending(Of TSource, TKey) (source As OrderedParallelQuery(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
An OrderedParallelQuery{TSource} that contains elements to sort.
- keySelector
- Func<TSource,TKey>
A function to extract a key from an element.
- comparer
- IComparer<TKey>
An IComparer{TKey} to compare keys.
Returns
A sequence 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.
