Kiyan Ahmadizadeh created CRUNCH-57:
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Summary: Add a length function to PCollection
Key: CRUNCH-57
URL: https://issues.apache.org/jira/browse/CRUNCH-57
Project: Crunch
Issue Type: New Feature
Components: Core
Affects Versions: 0.3.0
Reporter: Kiyan Ahmadizadeh
Assignee: Josh Wills
Sometimes it's useful and interesting to compute the number of elements in a
PCollection.
For example, suppose there was an initial PCollection that was then filtered
into another. If I'm interested in how many elements of the original
PCollection matched the filter, I'll have to write extra code to compute this.
PCollections should have a length method that, when called, computes the number
of elements in the PCollection and returns the result.
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