zhengruifeng commented on code in PR #40097:
URL: https://github.com/apache/spark/pull/40097#discussion_r1114323509
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mllib-common/src/main/scala/org/apache/spark/ml/attribute/attributes.scala:
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@@ -339,7 +338,7 @@ class NominalAttribute private[ml] (
override def isNominal: Boolean = true
private lazy val valueToIndex: Map[String, Int] = {
- values.map(Utils.toMapWithIndex(_)).getOrElse(Map.empty)
+ values.map(_.zipWithIndex.toMap).getOrElse(Map.empty)
Review Comment:
here partially revert
https://github.com/apache/spark/commit/9cae423075145d3dd81d53f4b82d4f2af6fe7c15
to avoid directly depending on spark-core
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