Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/22236#discussion_r213523669
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/fpm/AssociationRules.scala ---
@@ -116,6 +135,9 @@ object AssociationRules {
@Since("1.5.0")
def confidence: Double = freqUnion.toDouble / freqAntecedent
--- End diff --
I suppose this `.toDouble` is redundant actually!
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