kinow commented on issue #109: TEXT-155: Add a generic IntersectionSimilarity measure URL: https://github.com/apache/commons-text/pull/109#issuecomment-470703522 @aherbert I will have another play with the code later with more time. Another library also implemented [helper class/method for the intersection](https://github.com/Simmetrics/simmetrics/blob/59dc148f402da6a8a82ad8604a64fa35d1f70460/simmetrics-core/src/main/java/org/simmetrics/metrics/Math.java). I think the design here looks similar. However, I think it would make more sense to have the `IntersectionResult` being used in other metrics. Wouldn't it be possible to use `IntersectionResult` in the Jaccard and even in the new Sorensen-Dice metrics? We can leave the `IntersectionSimilarity` but maybe use it as an internal or package protected class? Moving the F1 score and Jaccard to its own classes (in the Jaccard case, I believe it means replacing the code in the existing `JaccardSimilarity` by `IntersectionResult` + `IntersectionSimilarity`, then in the return of the `JaccardSimilarity#apply` simply have the code we have now in `IntersectionResult#getJaccard` ). What do you think?
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