ParallelEnumerable.First Method
Definition
Important
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Returns the first element of a parallel sequence.
Overloads
First<TSource>(ParallelQuery<TSource>) |
Returns the first element of a parallel sequence. |
First<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) |
Returns the first element in a parallel sequence that satisfies a specified condition. |
First<TSource>(ParallelQuery<TSource>)
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Returns the first element of a parallel sequence.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static TSource First(System::Linq::ParallelQuery<TSource> ^ source);
public static TSource First<TSource> (this System.Linq.ParallelQuery<TSource> source);
static member First : System.Linq.ParallelQuery<'Source> -> 'Source
<Extension()>
Public Function First(Of TSource) (source As ParallelQuery(Of TSource)) As TSource
Type Parameters
- TSource
The type of the elements of source
.
Parameters
- source
- ParallelQuery<TSource>
The sequence to return the first element of.
Returns
The first element in the specified 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.
source
contains no elements.
Remarks
If the query is not ordered, then the first element is non-deterministic. For more information, see Order Preservation in PLINQ.
See also
Applies to
First<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>)
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Returns the first element in a parallel sequence that satisfies a specified condition.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static TSource First(System::Linq::ParallelQuery<TSource> ^ source, Func<TSource, bool> ^ predicate);
public static TSource First<TSource> (this System.Linq.ParallelQuery<TSource> source, Func<TSource,bool> predicate);
static member First : System.Linq.ParallelQuery<'Source> * Func<'Source, bool> -> 'Source
<Extension()>
Public Function First(Of TSource) (source As ParallelQuery(Of TSource), predicate As Func(Of TSource, Boolean)) As TSource
Type Parameters
- TSource
The type of the elements of source
.
Parameters
- source
- ParallelQuery<TSource>
The sequence to return an element from.
Returns
The first element in the sequence that passes the test in the specified 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.
No element in source
satisfies the condition in predicate
.
Remarks
If the query is not ordered, then the first element is non-deterministic. For more information, see Order Preservation in PLINQ.
See also
Applies to
.NET
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