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Posted to dev@crunch.apache.org by "Gabriel Reid (JIRA)" <ji...@apache.org> on 2013/05/20 09:13:16 UTC
[jira] [Commented] (CRUNCH-208) Add a mapValues convenience
function to PTable and PGroupedTable
[ https://issues.apache.org/jira/browse/CRUNCH-208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661822#comment-13661822 ]
Gabriel Reid commented on CRUNCH-208:
-------------------------------------
+1. That's definitely a pattern that seems to come up very regularly.
I guess that's what o.a.c.fn.MapValues is intended for, but I never end up using it because feels wrong to extend from MapValuesFn instead of just from MapFn. What I usually end up doing is using a MapValuesFn that wraps a MapFn to get this same functionality, but with the addition of this method maybe we could even deprecate MapValuesFn.
> Add a mapValues convenience function to PTable and PGroupedTable
> ----------------------------------------------------------------
>
> Key: CRUNCH-208
> URL: https://issues.apache.org/jira/browse/CRUNCH-208
> Project: Crunch
> Issue Type: Improvement
> Components: Core
> Reporter: Josh Wills
> Assignee: Josh Wills
> Attachments: CRUNCH-208.patch
>
>
> Working on Cloudera ML, I find myself writing lots of functions where I'm only modifying the values of a PTable or PGroupedTable and just passing along the keys as they are, so I wrote some functions to help me implement that pattern more easily.
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