ParallelEnumerable.LastOrDefault Method
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Returns the last element of a parallel sequence, or a default value if the sequence contains no elements.
| LastOrDefault<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) |
Returns the last element of a parallel sequence that satisfies a condition, or a default value if no such element is found. |
| LastOrDefault<TSource>(ParallelQuery<TSource>) |
Returns the last element of a parallel sequence, or a default value if the sequence contains no elements. |
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Returns the last element of a parallel sequence that satisfies a condition, or a default value if no such element is found.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static TSource LastOrDefault(System::Linq::ParallelQuery<TSource> ^ source, Func<TSource, bool> ^ predicate);public static TSource LastOrDefault<TSource>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,bool> predicate);public static TSource? LastOrDefault<TSource>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,bool> predicate);static member LastOrDefault : System.Linq.ParallelQuery<'Source> * Func<'Source, bool> -> 'Source<Extension()>
Public Function LastOrDefault(Of TSource) (source As ParallelQuery(Of TSource), predicate As Func(Of TSource, Boolean)) As TSourceType Parameters
- TSource
The type of the elements of source.
Parameters
- source
- ParallelQuery<TSource>
The sequence to return an element from.
Returns
default() if the sequence is empty or if no elements pass the test in the predicate function; otherwise, the last element that passes the test in the predicate function.
Exceptions
The query was canceled with the token passed in through WithCancellation<TSource>(ParallelQuery<TSource>, CancellationToken).
source or predicate is a null reference (Nothing in Visual Basic).
One or more exceptions occurred during the evaluation of the query.
Remarks
If the query is not ordered, then the last element is non-deterministic. For more information, see Order Preservation in PLINQ.
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
Returns the last element of a parallel sequence, or a default value if the sequence contains no elements.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static TSource LastOrDefault(System::Linq::ParallelQuery<TSource> ^ source);public static TSource LastOrDefault<TSource>(this System.Linq.ParallelQuery<TSource> source);public static TSource? LastOrDefault<TSource>(this System.Linq.ParallelQuery<TSource> source);static member LastOrDefault : System.Linq.ParallelQuery<'Source> -> 'Source<Extension()>
Public Function LastOrDefault(Of TSource) (source As ParallelQuery(Of TSource)) As TSourceType Parameters
- TSource
The type of the elements of source.
Parameters
- source
- ParallelQuery<TSource>
The sequence to return an element from.
Returns
default() if the source sequence is empty; otherwise, the last element in the sequence.
Exceptions
The query was canceled with the token passed in through WithCancellation<TSource>(ParallelQuery<TSource>, CancellationToken).
source is a null reference (Nothing in Visual Basic).
One or more exceptions occurred during the evaluation of the query.
Remarks
If the query is not ordered, then the last element is non-deterministic. For more information, see Order Preservation in PLINQ.
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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