Github user mengxr commented on the pull request:
https://github.com/apache/spark/pull/1025#issuecomment-50290028
@dorx I removed commons-math3 from dependencies, separated `sampleByKey`
and `sampleByKeyExact`, and corrected the math in waitlisting in sampling with
replacement.
Other than those changes, the refactoring was completely based on your
implementation. I did some renaming but I'm not taking any credit for the
implementation. Some of the refactoring was unnecessary, which was partially
because I did this around 5am and my head was not clear. I'm really sorry for
the unnecessary code changes.
Since this is apparently your contribution, do you mind re-opening the PR?
Thanks!
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