Brian Hulette created ARROW-2410:

             Summary: [JS] Add DataFrame.scanAsync
                 Key: ARROW-2410
             Project: Apache Arrow
          Issue Type: Improvement
          Components: JavaScript
            Reporter: Brian Hulette

Add a version of `DataFrame.scan`, `scanAsync` that yields periodically. The 
yield frequency could be specified either as a number of record batches, or a 
number of records.

This scan should also be cancellable.

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