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Posted to jira@arrow.apache.org by "Yibo Cai (Jira)" <ji...@apache.org> on 2021/01/29 02:02:00 UTC

[jira] [Commented] (ARROW-11368) [C++][Compute] Return scalar if only one mode or quantile is required

    [ https://issues.apache.org/jira/browse/ARROW-11368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17274108#comment-17274108 ] 

Yibo Cai commented on ARROW-11368:
----------------------------------

It does makes python code more user friendly, but it also leads to harder to use c++ interface.
I would like to cancel this request as won't do.
That said, I did implemented according patch, uploaded here in case one day I changed mind.
 [^return-scalar.patch] 

> [C++][Compute] Return scalar if only one mode or quantile is required
> ---------------------------------------------------------------------
>
>                 Key: ARROW-11368
>                 URL: https://issues.apache.org/jira/browse/ARROW-11368
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Yibo Cai
>            Assignee: Yibo Cai
>            Priority: Major
>         Attachments: return-scalar.patch
>
>
> Mode and quantile kernels support returning multiple values and always return array to hold multiple values. If only one value is required, an array of size 1 is returned. It's better to return a scalar instead in this case.



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