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Posted to jira@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2021/05/17 18:01:01 UTC

[jira] [Commented] (ARROW-12813) [C++] Support for a `full` compute function

    [ https://issues.apache.org/jira/browse/ARROW-12813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17346324#comment-17346324 ] 

Antoine Pitrou commented on ARROW-12813:
----------------------------------------

It could be exposed in Python/R without being a compute function.
That said, {{np.full}} is intrinsically more useful than an Arrow equivalent because Numpy arrays are mutable.

> [C++] Support for a `full` compute function
> -------------------------------------------
>
>                 Key: ARROW-12813
>                 URL: https://issues.apache.org/jira/browse/ARROW-12813
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Weston Pace
>            Priority: Major
>
> Given a scalar value and a length return an array where all values are equal to the scalar value.
> The name "full" is derived from [https://numpy.org/doc/stable/reference/generated/numpy.full.html] but if anyone has a more clever name please recommend it.
> There are a number of utility functions in C++ that do this already.  However, exposing this as a compute function would allow R/Python to easily generate arrays.



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