Github user jaceklaskowski commented on the pull request:
https://github.com/apache/spark/pull/13329#issuecomment-222140528
The issue with `nonEmpty` is that you could easily miss the negation (and
that's why Scala offers `nonEmpty`). I don't think it's the final solution, but
certainly believe it's far better for future readers to know what's going on in
these lines. I believe the changes improve readability (but can happily revert
_some_ if you point me at the places that need this).
It's just me to believe that by doing these small changes the code becomes
more readable. I spent enough time with it to think it needs so (more often
than I'm proposing).
Please guide me to learn your coding style. Thanks!
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