Ruifeng Zheng created SPARK-60237:
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Summary: Use OpenHashSet for binary HashingTF
Key: SPARK-60237
URL: https://issues.apache.org/jira/browse/SPARK-60237
Project: Spark
Issue Type: Sub-task
Components: ML
Affects Versions: 5.0.0
Reporter: Ruifeng Zheng
Binary HashingTF only needs to track distinct feature indices. Use
OpenHashSet[Int], sort the resulting indices, and construct a sparse vector
with 1.0 values. This is implemented in
https://github.com/apache/spark/pull/59461.
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