Aaron Wong created HIVEMALL-253:
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Summary: UDF map_roulette() created
Key: HIVEMALL-253
URL: https://issues.apache.org/jira/browse/HIVEMALL-253
Project: Hivemall
Issue Type: New Feature
Affects Versions: 0.6.0
Reporter: Aaron Wong
In data processing process, we usually encounter the problem that we have some
selection and their probably(or weight), we should select one of them according
to their probably(or weight).
UDF map_roulette() is a implement of roulette. It can select a Key from a map
according to key's weight value.
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