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https://issues.apache.org/jira/browse/SPARK-59173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-59173.
-----------------------------------
    Fix Version/s: 5.0.0
       Resolution: Fixed

Issue resolved by pull request 58471
[https://github.com/apache/spark/pull/58471]

> Use isEmpty/nonEmpty instead of size comparisons in MLlib
> ---------------------------------------------------------
>
>                 Key: SPARK-59173
>                 URL: https://issues.apache.org/jira/browse/SPARK-59173
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML
>    Affects Versions: 4.4.0
>            Reporter: Uroš Bojanić
>            Assignee: Uroš Bojanić
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 5.0.0
>
>
> Replaces the 'size == 0' collection-emptiness idiom with 'isEmpty' in the 
> mllib module (3 occurrences): TreeEnsembleModel (ml/tree/treeModels.scala, 
> main) where totalImportances is an OpenHashMap (extends Iterable), and two 
> filtered Seq[ShuffleDependency] checks in ALSSuite (test). ChiSqTest is 
> intentionally left unchanged: there expected.size / observed.size are the 
> dimensions of an mllib.linalg.Vector (with a numeric == 0.0 comparison), not 
> a collection size, and Vector has no isEmpty. Counterpart of SPARK-59149 
> (SQL) and SPARK-59172 (core).



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