Github user erikerlandson commented on the pull request:
https://github.com/apache/spark/pull/1254#issuecomment-50554859
I updated this PR so that drop(), dropRight() and dropWhile() are now lazy
transforms. A description of what I did is here:
http://erikerlandson.github.io/blog/2014/07/29/deferring-spark-actions-to-lazy-transforms-with-the-promise-rdd/
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