AsyncEnumerable.GroupBy Method (System.Linq) (original) (raw)
Definition
Overloads
| GroupBy<TSource,TKey,TElement,TResult>(IAsyncEnumerable, Func<TSource,CancellationToken,ValueTask>, Func<TSource, CancellationToken,ValueTask>, Func<TKey,IEnumerable, CancellationToken,ValueTask>, IEqualityComparer) | Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function. |
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| GroupBy<TSource,TKey,TElement,TResult>(IAsyncEnumerable, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable, TResult>, IEqualityComparer) | Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function. |
| GroupBy<TSource,TKey,TElement>(IAsyncEnumerable, Func<TSource, CancellationToken,ValueTask>, Func<TSource,CancellationToken, ValueTask>, IEqualityComparer) | Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function. |
| GroupBy<TSource,TKey,TElement>(IAsyncEnumerable, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer) | Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function. |
| GroupBy<TSource,TKey,TResult>(IAsyncEnumerable, Func<TSource, CancellationToken,ValueTask>, Func<TKey,IEnumerable, CancellationToken,ValueTask>, IEqualityComparer) | Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. |
| GroupBy<TSource,TKey,TResult>(IAsyncEnumerable, Func<TSource,TKey>, Func<TKey,IEnumerable,TResult>, IEqualityComparer) | Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. |
| GroupBy<TSource,TKey>(IAsyncEnumerable, Func<TSource,CancellationToken,ValueTask>, IEqualityComparer) | Groups the elements of a sequence according to a specified key selector function. |
| GroupBy<TSource,TKey>(IAsyncEnumerable, Func<TSource,TKey>, IEqualityComparer) | Groups the elements of a sequence according to a specified key selector function. |
GroupBy<TSource,TKey,TElement,TResult>(IAsyncEnumerable, Func<TSource,CancellationToken,ValueTask>, Func<TSource, CancellationToken,ValueTask>, Func<TKey,IEnumerable, CancellationToken,ValueTask>, IEqualityComparer)
Source:
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function.
public static System.Collections.Generic.IAsyncEnumerable<TResult> GroupBy<TSource,TKey,TElement,TResult>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TKey>> keySelector, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TElement>> elementSelector, Func<TKey,System.Collections.Generic.IEnumerable<TElement>,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TResult>> resultSelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupBy : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Key>> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Element>> * Func<'Key, seq<'Element>, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Result>> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<'Result><Extension()>
Public Function GroupBy(Of TSource, TKey, TElement, TResult) (source As IAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, CancellationToken, ValueTask(Of TKey)), elementSelector As Func(Of TSource, CancellationToken, ValueTask(Of TElement)), resultSelector As Func(Of TKey, IEnumerable(Of TElement), CancellationToken, ValueTask(Of TResult)), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of TResult)Type Parameters
TSource
The type of the elements of source.
TKey
The type of the key returned by keySelector.
TResult
The type of the result value returned by resultSelector.
Parameters
Returns
A collection of elements of type TResult where each element represents a projection over a group and its key.
Exceptions
Applies to
GroupBy<TSource,TKey,TElement,TResult>(IAsyncEnumerable, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable, TResult>, IEqualityComparer)
Source:
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function.
public static System.Collections.Generic.IAsyncEnumerable<TResult> GroupBy<TSource,TKey,TElement,TResult>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,TKey> keySelector, Func<TSource,TElement> elementSelector, Func<TKey,System.Collections.Generic.IEnumerable<TElement>,TResult> resultSelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupBy : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, 'Key> * Func<'Source, 'Element> * Func<'Key, seq<'Element>, 'Result> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<'Result><Extension()>
Public Function GroupBy(Of TSource, TKey, TElement, TResult) (source As IAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, TKey), elementSelector As Func(Of TSource, TElement), resultSelector As Func(Of TKey, IEnumerable(Of TElement), TResult), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of TResult)Type Parameters
TSource
The type of the elements of source.
TKey
The type of the key returned by keySelector.
TResult
The type of the result value returned by resultSelector.
Parameters
keySelector
Func<TSource,TKey>
A function to extract the key for each element.
resultSelector
Func<TKey,IEnumerable,TResult>
A function to create a result value from each group.
Returns
A collection of elements of type TResult where each element represents a projection over a group and its key.
Exceptions
Applies to
GroupBy<TSource,TKey,TElement>(IAsyncEnumerable, Func<TSource, CancellationToken,ValueTask>, Func<TSource,CancellationToken, ValueTask>, IEqualityComparer)
Source:
Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function.
public static System.Collections.Generic.IAsyncEnumerable<System.Linq.IGrouping<TKey,TElement>> GroupBy<TSource,TKey,TElement>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TKey>> keySelector, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TElement>> elementSelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupBy : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Key>> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Element>> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<System.Linq.IGrouping<'Key, 'Element>><Extension()>
Public Function GroupBy(Of TSource, TKey, TElement) (source As IAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, CancellationToken, ValueTask(Of TKey)), elementSelector As Func(Of TSource, CancellationToken, ValueTask(Of TElement)), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of IGrouping(Of TKey, TElement))Type Parameters
TSource
The type of the elements of source.
TKey
The type of the key returned by keySelector.
Parameters
Returns
An IAsyncEnumerable where each IGrouping<TKey,TElement>contains a sequence of objects of type TElement and a key.
Exceptions
Applies to
GroupBy<TSource,TKey,TElement>(IAsyncEnumerable, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer)
Source:
Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function.
public static System.Collections.Generic.IAsyncEnumerable<System.Linq.IGrouping<TKey,TElement>> GroupBy<TSource,TKey,TElement>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,TKey> keySelector, Func<TSource,TElement> elementSelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupBy : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, 'Key> * Func<'Source, 'Element> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<System.Linq.IGrouping<'Key, 'Element>><Extension()>
Public Function GroupBy(Of TSource, TKey, TElement) (source As IAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, TKey), elementSelector As Func(Of TSource, TElement), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of IGrouping(Of TKey, TElement))Type Parameters
TSource
The type of the elements of source.
TKey
The type of the key returned by keySelector.
Parameters
keySelector
Func<TSource,TKey>
A function to extract the key for each element.
Returns
An IAsyncEnumerable where each IGrouping<TKey,TElement>contains a sequence of objects of type TElement and a key.
Exceptions
Applies to
GroupBy<TSource,TKey,TResult>(IAsyncEnumerable, Func<TSource, CancellationToken,ValueTask>, Func<TKey,IEnumerable, CancellationToken,ValueTask>, IEqualityComparer)
Source:
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
public static System.Collections.Generic.IAsyncEnumerable<TResult> GroupBy<TSource,TKey,TResult>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TKey>> keySelector, Func<TKey,System.Collections.Generic.IEnumerable<TSource>,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TResult>> resultSelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupBy : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Key>> * Func<'Key, seq<'Source>, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Result>> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<'Result><Extension()>
Public Function GroupBy(Of TSource, TKey, TResult) (source As IAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, CancellationToken, ValueTask(Of TKey)), resultSelector As Func(Of TKey, IEnumerable(Of TSource), CancellationToken, ValueTask(Of TResult)), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of TResult)Type Parameters
TSource
The type of the elements of source.
TKey
The type of the key returned by keySelector.
TResult
The type of the result value returned by resultSelector.
Parameters
Returns
A collection of elements of type TResult where each element represents a projection over a group and its key.
Exceptions
Applies to
GroupBy<TSource,TKey,TResult>(IAsyncEnumerable, Func<TSource,TKey>, Func<TKey,IEnumerable,TResult>, IEqualityComparer)
Source:
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
public static System.Collections.Generic.IAsyncEnumerable<TResult> GroupBy<TSource,TKey,TResult>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,TKey> keySelector, Func<TKey,System.Collections.Generic.IEnumerable<TSource>,TResult> resultSelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupBy : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, 'Key> * Func<'Key, seq<'Source>, 'Result> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<'Result><Extension()>
Public Function GroupBy(Of TSource, TKey, TResult) (source As IAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, TKey), resultSelector As Func(Of TKey, IEnumerable(Of TSource), TResult), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of TResult)Type Parameters
TSource
The type of the elements of source.
TKey
The type of the key returned by keySelector.
TResult
The type of the result value returned by resultSelector.
Parameters
keySelector
Func<TSource,TKey>
A function to extract the key for each element.
resultSelector
Func<TKey,IEnumerable,TResult>
A function to create a result value from each group.
Returns
A collection of elements of type TResult where each element represents a projection over a group and its key.
Exceptions
Applies to
GroupBy<TSource,TKey>(IAsyncEnumerable, Func<TSource,CancellationToken,ValueTask>, IEqualityComparer)
Source:
Groups the elements of a sequence according to a specified key selector function.
public static System.Collections.Generic.IAsyncEnumerable<System.Linq.IGrouping<TKey,TSource>> GroupBy<TSource,TKey>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TKey>> keySelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupBy : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Key>> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<System.Linq.IGrouping<'Key, 'Source>><Extension()>
Public Function GroupBy(Of TSource, TKey) (source As IAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, CancellationToken, ValueTask(Of TKey)), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of IGrouping(Of TKey, TSource))Type Parameters
TSource
The type of the elements of source.
TKey
The type of the key returned by keySelector.
Parameters
Returns
An IAsyncEnumerable where each IGrouping<TKey,TElement>contains a sequence of objects and a key.
Exceptions
Applies to
GroupBy<TSource,TKey>(IAsyncEnumerable, Func<TSource,TKey>, IEqualityComparer)
Source:
Groups the elements of a sequence according to a specified key selector function.
public static System.Collections.Generic.IAsyncEnumerable<System.Linq.IGrouping<TKey,TSource>> GroupBy<TSource,TKey>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupBy : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, 'Key> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<System.Linq.IGrouping<'Key, 'Source>><Extension()>
Public Function GroupBy(Of TSource, TKey) (source As IAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, TKey), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of IGrouping(Of TKey, TSource))Type Parameters
TSource
The type of the elements of source.
TKey
The type of the key returned by keySelector.
Parameters
keySelector
Func<TSource,TKey>
A function to extract the key for each element.
Returns
An IAsyncEnumerable where each IGrouping<TKey,TElement>contains a sequence of objects and a key.