[GitHub] [incubator-datasketches-java] leerho commented on issue #301: Does Union support multi Sketch flavor updates?

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leerho commented on issue #301: Does Union support multi Sketch flavor updates?
URL: https://github.com/apache/incubator-datasketches-java/issues/301#issuecomment-586066714
 
 
   As stated in the [documentation](https://datasketches.apache.org/api/java/snapshot/apidocs/index.html), the AnotB operation is not iterative like Intersection and Union.  It is a stateless function that resets after the getResult.   So your second call to aNotB returns 0.   So instead of your code try this:
   
   ```
   AnotB aNotB = SetOperationBuilder.buildAnotB();
   aNotB.update(SketchA, SketchB); //Called only once.
   CompactSketch result = aNotB.getResult();
   System.out.println(result.getEstimate());
   
   Union finalUnion = Union.builder().setNominalEntries(4096).buildUnion();
   finalUnion.update(result);
   System.out.println(finalUnion.getResult().getEstimate());
   ```

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