externalDatasetReducer <T, Data>

User-function used in the Dataset.reduce() API.

Callable

• DatasetReducer(memo: T, item: Data, index: number): Awaitable<T>

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• Parameters

  • externalmemo: T

    Previous state of the reduction.

  • externalitem: Data

    Current Dataset entry being processed.

  • externalindex: number

    Position of current Dataset entry.

  Returns Awaitable<T>