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Commit 5377fc62 authored by Nick Lavers's avatar Nick Lavers Committed by Sean Owen
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[SPARK-16961][CORE] Fixed off-by-one error that biased randomizeInPlace 

JIRA issue link:
https://issues.apache.org/jira/browse/SPARK-16961

Changed one line of Utils.randomizeInPlace to allow elements to stay in place.

Created a unit test that runs a Pearson's chi squared test to determine whether the output diverges significantly from a uniform distribution.

Author: Nick Lavers <nick.lavers@videoamp.com>

Closes #14551 from nicklavers/SPARK-16961-randomizeInPlace.
parent 287bea13
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