AsyncEnumerable.GroupJoin Method
Definition
Important
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Overloads
| GroupJoin<TOuter,TInner,TKey,TResult>(IAsyncEnumerable<TOuter>, IAsyncEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>, IEqualityComparer<TKey>) |
Correlates the elements of two sequences based on key equality and groups the results. |
| GroupJoin<TOuter,TInner,TKey,TResult>(IAsyncEnumerable<TOuter>, IAsyncEnumerable<TInner>, Func<TOuter,CancellationToken,ValueTask<TKey>>, Func<TInner,CancellationToken,ValueTask<TKey>>, Func<TOuter, IEnumerable<TInner>,CancellationToken,ValueTask<TResult>>, IEqualityComparer<TKey>) |
Correlates the elements of two sequences based on key equality and groups the results. |
GroupJoin<TOuter,TInner,TKey,TResult>(IAsyncEnumerable<TOuter>, IAsyncEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>, IEqualityComparer<TKey>)
- Source:
- GroupJoin.cs
Correlates the elements of two sequences based on key equality and groups the results.
public static System.Collections.Generic.IAsyncEnumerable<TResult> GroupJoin<TOuter,TInner,TKey,TResult>(this System.Collections.Generic.IAsyncEnumerable<TOuter> outer, System.Collections.Generic.IAsyncEnumerable<TInner> inner, Func<TOuter,TKey> outerKeySelector, Func<TInner,TKey> innerKeySelector, Func<TOuter,System.Collections.Generic.IEnumerable<TInner>,TResult> resultSelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupJoin : System.Collections.Generic.IAsyncEnumerable<'Outer> * System.Collections.Generic.IAsyncEnumerable<'Inner> * Func<'Outer, 'Key> * Func<'Inner, 'Key> * Func<'Outer, seq<'Inner>, 'Result> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<'Result><Extension()>
Public Function GroupJoin(Of TOuter, TInner, TKey, TResult) (outer As IAsyncEnumerable(Of TOuter), inner As IAsyncEnumerable(Of TInner), outerKeySelector As Func(Of TOuter, TKey), innerKeySelector As Func(Of TInner, TKey), resultSelector As Func(Of TOuter, IEnumerable(Of TInner), TResult), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of TResult)Type Parameters
- TOuter
- TInner
- TKey
- TResult
Parameters
- outer
- IAsyncEnumerable<TOuter>
The first sequence to join.
- inner
- IAsyncEnumerable<TInner>
The sequence to join to the first sequence.
- outerKeySelector
- Func<TOuter,TKey>
A function to extract the join key from each element of the first sequence.
- innerKeySelector
- Func<TInner,TKey>
A function to extract the join key from each element of the second sequence.
- resultSelector
- Func<TOuter,IEnumerable<TInner>,TResult>
A function to create a result element from an element from the first sequence and a collection of matching elements from the second sequence.
- comparer
- IEqualityComparer<TKey>
An IEqualityComparer<T> to use to hash and compare keys.
Returns
An IAsyncEnumerable<T> that contains elements of type TResult
that are obtained by performing a grouped join on two sequences.
Exceptions
resultSelector is null.
Applies to
GroupJoin<TOuter,TInner,TKey,TResult>(IAsyncEnumerable<TOuter>, IAsyncEnumerable<TInner>, Func<TOuter,CancellationToken,ValueTask<TKey>>, Func<TInner,CancellationToken,ValueTask<TKey>>, Func<TOuter, IEnumerable<TInner>,CancellationToken,ValueTask<TResult>>, IEqualityComparer<TKey>)
- Source:
- GroupJoin.cs
Correlates the elements of two sequences based on key equality and groups the results.
public static System.Collections.Generic.IAsyncEnumerable<TResult> GroupJoin<TOuter,TInner,TKey,TResult>(this System.Collections.Generic.IAsyncEnumerable<TOuter> outer, System.Collections.Generic.IAsyncEnumerable<TInner> inner, Func<TOuter,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TKey>> outerKeySelector, Func<TInner,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TKey>> innerKeySelector, Func<TOuter,System.Collections.Generic.IEnumerable<TInner>,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TResult>> resultSelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer = default);static member GroupJoin : System.Collections.Generic.IAsyncEnumerable<'Outer> * System.Collections.Generic.IAsyncEnumerable<'Inner> * Func<'Outer, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Key>> * Func<'Inner, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Key>> * Func<'Outer, seq<'Inner>, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Result>> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Collections.Generic.IAsyncEnumerable<'Result><Extension()>
Public Function GroupJoin(Of TOuter, TInner, TKey, TResult) (outer As IAsyncEnumerable(Of TOuter), inner As IAsyncEnumerable(Of TInner), outerKeySelector As Func(Of TOuter, CancellationToken, ValueTask(Of TKey)), innerKeySelector As Func(Of TInner, CancellationToken, ValueTask(Of TKey)), resultSelector As Func(Of TOuter, IEnumerable(Of TInner), CancellationToken, ValueTask(Of TResult)), Optional comparer As IEqualityComparer(Of TKey) = Nothing) As IAsyncEnumerable(Of TResult)Type Parameters
- TOuter
- TInner
- TKey
- TResult
Parameters
- outer
- IAsyncEnumerable<TOuter>
The first sequence to join.
- inner
- IAsyncEnumerable<TInner>
The sequence to join to the first sequence.
- outerKeySelector
- Func<TOuter,CancellationToken,ValueTask<TKey>>
A function to extract the join key from each element of the first sequence.
- innerKeySelector
- Func<TInner,CancellationToken,ValueTask<TKey>>
A function to extract the join key from each element of the second sequence.
- resultSelector
- Func<TOuter,IEnumerable<TInner>,CancellationToken,ValueTask<TResult>>
A function to create a result element from an element from the first sequence and a collection of matching elements from the second sequence.
- comparer
- IEqualityComparer<TKey>
An IEqualityComparer<T> to use to hash and compare keys.
Returns
An IAsyncEnumerable<T> that contains elements of type TResult
that are obtained by performing a grouped join on two sequences.
Exceptions
resultSelector is null.
