Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/1950#discussion_r16279816
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala ---
@@ -1281,7 +1226,8 @@ object DecisionTree extends Serializable with Logging
{
val gains = Array.ofDim[InformationGainStats](numFeatures, numBins -
1)
for (featureIndex <- 0 until numFeatures) {
--- End diff --
use `while` instead of `for`
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