Github user mengxr commented on the pull request:
https://github.com/apache/spark/pull/1671#issuecomment-51364477
@MLnick `FeatureHasher` might be too general. One thing it is not clear
from its name is how to resolve conflicts: same word appears more than once, or
different words having the same hash value. We can add `FeatureHasher` (or
called `HashingVectorizer`) later. I think it might be useful to keep
`HashingTF` as a special case.
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