AsyncEnumerable.Where Method
Definition
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Overloads
| Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Int32,CancellationToken,ValueTask<Boolean>>) |
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. |
| Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,CancellationToken,ValueTask<Boolean>>) |
Filters a sequence of values based on a predicate. |
| Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Boolean>) |
Filters a sequence of values based on a predicate. |
| Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Int32,Boolean>) |
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. |
Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Int32,CancellationToken,ValueTask<Boolean>>)
- Source:
- Where.cs
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ Where(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, Func<TSource, int, System::Threading::CancellationToken, System::Threading::Tasks::ValueTask<bool>> ^ predicate);public static System.Collections.Generic.IAsyncEnumerable<TSource> Where<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,int,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<bool>> predicate);static member Where : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, int, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<bool>> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function Where(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Integer, CancellationToken, ValueTask(Of Boolean))) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
An IAsyncEnumerable<T> to filter.
- predicate
- Func<TSource,Int32,CancellationToken,ValueTask<Boolean>>
A function to test each element for a condition; the second parameter of the function represents the index of the source element.
Returns
An IAsyncEnumerable<T> that contains elements from the input sequence that satisfy the condition.
Exceptions
predicate is null.
Applies to
Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,CancellationToken,ValueTask<Boolean>>)
- Source:
- Where.cs
Filters a sequence of values based on a predicate.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ Where(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, Func<TSource, System::Threading::CancellationToken, System::Threading::Tasks::ValueTask<bool>> ^ predicate);public static System.Collections.Generic.IAsyncEnumerable<TSource> Where<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<bool>> predicate);static member Where : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<bool>> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function Where(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, CancellationToken, ValueTask(Of Boolean))) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
An IAsyncEnumerable<T> to filter.
- predicate
- Func<TSource,CancellationToken,ValueTask<Boolean>>
A function to test each element for a condition.
Returns
An IAsyncEnumerable<T> that contains elements from the input sequence that satisfy the condition.
Exceptions
predicate is null.
Applies to
Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Boolean>)
- Source:
- Where.cs
Filters a sequence of values based on a predicate.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ Where(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, Func<TSource, bool> ^ predicate);public static System.Collections.Generic.IAsyncEnumerable<TSource> Where<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,bool> predicate);static member Where : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, bool> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function Where(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Boolean)) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
An IAsyncEnumerable<T> to filter.
Returns
An IAsyncEnumerable<T> that contains elements from the input sequence that satisfy the condition.
Exceptions
predicate is null.
Applies to
Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Int32,Boolean>)
- Source:
- Where.cs
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ Where(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, Func<TSource, int, bool> ^ predicate);public static System.Collections.Generic.IAsyncEnumerable<TSource> Where<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,int,bool> predicate);static member Where : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, int, bool> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function Where(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Integer, Boolean)) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
An IAsyncEnumerable<T> to filter.
A function to test each element for a condition; the second parameter of the function represents the index of the source element.
Returns
An IAsyncEnumerable<T> that contains elements from the input sequence that satisfy the condition.
Exceptions
predicate is null.
Applies to
.NET