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https://issues.apache.org/jira/browse/HIVEMALL-253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16859743#comment-16859743
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ASF GitHub Bot commented on HIVEMALL-253:
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myui commented on pull request #193: [HIVEMALL-253-2] map_roulette UDF
URL: https://github.com/apache/incubator-hivemall/pull/193
revise #192
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> 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
> Assignee: Makoto Yui
> Priority: Major
>
> 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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