Github user hhbyyh commented on a diff in the pull request: https://github.com/apache/spark/pull/19588#discussion_r148442709 --- Diff: mllib/src/main/scala/org/apache/spark/ml/feature/VectorIndexer.scala --- @@ -287,9 +315,12 @@ class VectorIndexerModel private[ml] ( while (featureIndex < numFeatures) { if (categoryMaps.contains(featureIndex)) { // categorical feature - val featureValues: Array[String] = + var featureValues: Array[String] = --- End diff -- minor: this can still be a val with if else, right?
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