Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/23146#discussion_r237888294
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/optim/loss/DifferentiableRegularizationSuite.scala
---
@@ -16,9 +16,13 @@
*/
package org.apache.spark.ml.optim.loss
+import org.scalactic.{Equality, TolerantNumerics}
--- End diff --
We have ~== etc for approximate comparison
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