AsyncEnumerable.LastAsync Method (System.Linq) (original) (raw)
Definition
Namespace:
Assembly:
System.Linq.AsyncEnumerable.dll
Package:
System.Linq.AsyncEnumerable v10.0.0-preview.5.25277.114
Important
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Overloads
LastAsync(IAsyncEnumerable, CancellationToken)
Source:
Source:
Returns the last element of a sequence.
public static System.Threading.Tasks.ValueTask<TSource> LastAsync<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, System.Threading.CancellationToken cancellationToken = default);static member LastAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<'Source><Extension()>
Public Function LastAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of TSource)Type Parameters
TSource
The type of the elements of source.
Parameters
Returns
The value at the last position in the source sequence.
Exceptions
The source sequence is empty (via the returned task).
Applies to
LastAsync(IAsyncEnumerable, Func<TSource,Boolean>, CancellationToken)
Source:
Source:
Returns the last element of a sequence that satisfies a specified condition.
public static System.Threading.Tasks.ValueTask<TSource> LastAsync<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,bool> predicate, System.Threading.CancellationToken cancellationToken = default);static member LastAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, bool> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<'Source><Extension()>
Public Function LastAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Boolean), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of TSource)Type Parameters
TSource
The type of the elements of source.
Parameters
predicate
A function to test each element for a condition.
Returns
The last element in the sequence that passes the test in the specified predicate function.
Exceptions
The source sequence is empty, or no element in the sequence satisfies the condition in predicate (via the returned task).
Applies to
LastAsync(IAsyncEnumerable, Func<TSource,CancellationToken,ValueTask>, CancellationToken)
Source:
Source:
Returns the last element of a sequence that satisfies a specified condition.
public static System.Threading.Tasks.ValueTask<TSource> LastAsync<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<bool>> predicate, System.Threading.CancellationToken cancellationToken = default);static member LastAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<bool>> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<'Source><Extension()>
Public Function LastAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, CancellationToken, ValueTask(Of Boolean)), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of TSource)Type Parameters
TSource
The type of the elements of source.
Parameters
Returns
The last element in the sequence that passes the test in the specified predicate function.
Exceptions
The source sequence is empty, or no element in the sequence satisfies the condition in predicate (via the returned task).