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ARROW-2214: [JS] add nullBitmap getter to DictionaryData that proxies to its indices' nullBitmap #1659

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ARROW-2214: [JS] add nullBitmap getter to DictionaryData that proxies to its indices' nullBitmap #1659

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1 change: 1 addition & 0 deletions js/src/data.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -158,6 +158,7 @@ export class DictionaryData<T extends DataType> extends BaseData<Dictionary<T>>
this.length = this._indicies.length;
}
public get nullCount() { return this._indicies.nullCount; }
public get nullBitmap() { return this._indicies.nullBitmap; }
public clone<R extends Dictionary<T>>(type: R, length = this.length, offset = this.offset) {
const data = this._dictionary.data.clone(type.dictionary as any);
return new DictionaryData<R>(
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