Github user MLnick commented on the pull request:
https://github.com/apache/spark/pull/1671#issuecomment-51106074
@mengxr @mateiz just a broad note on this, it seems like this could
(should?) be a broader `FeatureHasher` implemented as as transform similar to
scikit-learn's approach. Vectorization for TF is sort of a special case.
Thoughts or plans for this sort of more generic feature
transformer/extraction interfaces and pipelines?
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