Github user koertkuipers commented on the pull request:
https://github.com/apache/spark/pull/3632#issuecomment-68011681
hey @markhamstra
i assume you are referring to the one method groupByKeyAndSortValues that
has an implicit Ordering[V] parameter, since the other groupByKeyAndSortValues
methods do not require an implicit Ordering to be available for the values (it
needs to be explicitly provided and is typically use-case specific and not the
natural ordering of values).
what the benefit is of an implicit conversion to a class that will have
this one method without the implicit parameter, versus a single method with an
implicit parameter? it seems to me this makes the api harder to understand. is
this for java perhaps?
i have to admit i am not sure i understand the reason for
OrderedRDDFunctions existence either (again 2 methods on PairRDDFunctions with
implicits seem preferred to me over a new class).
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