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Skip writing empty (chained) batch and make callbacks asynchronous #619
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This was referenced Apr 26, 2019
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Canary-tested against Level/abstract-leveldown#337, all good. |
peakji
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Apr 26, 2019
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Something for a rainy day: I think we can refactor chained and array-form batch to both use the => #623 |
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While hunting for bugs (see thread in #601) I found that:
hasData_property of chained batch is unused. Though LevelDB seems to be fine with writing an empty batch, this PR skips that ifhasData_is false, so that the behavior is symmetric withbatch([])(array-form) and withleveldown@4x.batch([])(array-form) isn't asynchronous if the array is empty.