Github user denmoroz commented on the pull request:
https://github.com/apache/spark/pull/2847#issuecomment-66125004
Maybe it is better to use RDD[BitSet] as transactions RDD? Then you can add
a preprocessor trait and make any transformations for source RDD to RDD of
BitSets. For example, transformation of RDD[Array[String]] to RDD[BitSet].
It seems to me, that BitSet is the much better idea of transactions
representation then Array[String] or Array[Int] or anything else.
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