Daniel Li created SPARK-20484:
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Summary: Add documentation to ALS code
Key: SPARK-20484
URL: https://issues.apache.org/jira/browse/SPARK-20484
Project: Spark
Issue Type: Improvement
Components: ML, MLlib
Affects Versions: 2.1.0
Reporter: Daniel Li
Priority: Trivial
The documentation (both Scaladocs and inline comments) for the ALS code (in
package {{org.apache.spark.ml.recommendation}}) can be clarified where needed
and expanded where incomplete. This is especially important for parts of the
code that are written imperatively for performance, as these parts don't
benefit from the intuitive self-documentation of Scala's higher-level language
abstractions. Specifically, I'd like to add documentation fully explaining the
key functionality of the in-block and out-block objects, their purpose, how
they relate to the overall ALS algorithm, and how they are calculated in such a
way that new maintainers can ramp up much more quickly.
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