Github user aarondav commented on the pull request:
https://github.com/apache/incubator-spark/pull/536#discussion_r9780371
I don't think a semicolon is gramatically correct here. In fact, I think
"The `updateStateByKey` operation allows you to maintain some state data
and continuously update it with new information."
sounds reasonable. "Arbitrary stateful computation" is probably one of the
definitions of a Turing machine, after all.
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