Function groupJoin

groupJoin<TOuter, TInner, TKey, TResult>(inner, outerSelector, innerSelector, resultSelector): OperatorAsyncFunction<TOuter, TResult>
Correlates the elements of two async-iterable sequences based on equality of keys and groups the results.
Type Parameters
- TOuter
  
  The type of the elements of the first async-iterable sequence.
- TInner
  
  The type of the elements of the second async-iterable sequence.
- TKey
  
  The type of the keys returned by the key selector functions.
- TResult
  
  The type of the result elements.
Parameters
- inner: AsyncIterable<TInner>
  
  The async-enumerable sequence to join to the first sequence.
- outerSelector: ((value, signal?) => TKey | Promise<TKey>)
  
  A function to extract the join key from each element of the first sequence.
  - - (value, signal?): TKey | Promise<TKey>
    - Parameters
      
      value: TOuter
      
      Optional signal: AbortSignal
      
      Returns TKey | Promise<TKey>
- innerSelector: ((value, signal?) => TKey | Promise<TKey>)
  
  A function to extract the join key from each element of the second sequence.
  - - (value, signal?): TKey | Promise<TKey>
    - Parameters
      
      value: TInner
      
      Optional signal: AbortSignal
      
      Returns TKey | Promise<TKey>
- resultSelector: ((outer, inner, signal?) => TResult | Promise<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.
  - - (outer, inner, signal?): TResult | Promise<TResult>
    - Parameters
      
      outer: TOuter
      
      inner: AsyncIterable<TInner>
      
      Optional signal: AbortSignal
      
      Returns TResult | Promise<TResult>
Returns OperatorAsyncFunction<TOuter, TResult>
An operator that returns an async-iterable sequence that contains the result elements that are obtained by performing a grouped join on two sequences.
- Defined in asynciterable/operators/groupjoin.ts:72

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