[jira] [Resolved] (ARROW-14650) [JS] toArray equivalent to values/values64

["Dominik Moritz (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-14650?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dominik Moritz resolved ARROW-14650.
------------------------------------
    Fix Version/s: 7.0.0
       Resolution: Implemented

> [JS] toArray equivalent to values/values64
> ------------------------------------------
>
>                 Key: ARROW-14650
>                 URL: https://issues.apache.org/jira/browse/ARROW-14650
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: JavaScript
>            Reporter: Nicholas Roberts
>            Priority: Minor
>             Fix For: 7.0.0
>
>
> As discussed in ARROW-10901, 64 bit integer vectors have values64 getters available for systems with support for BigInt typed arrays. Column-oriented dataframe libraries (such as UW's [arquero|https://github.com/uwdata/arquero]) generally use the Chunked::toArray convenience method in favour of directly dealing with chunks or vectors, and therefore always receive the int32/uint32 data.
> I think there are a few alternatives for improving high level access to a 64 bit column's values:
>  * An optional bit width (or is64Bit, like the <T>::from variants) parameter in Chunked::toArray, IntVector::toArray.
>  * A new Chunked::toArray64 method, and the same on IntVector (or at least, the 64 bit variants).
>  * Use values64 directly in the consuming library (loop over the chunks, copy into a destination typed array).
> The toArray64 option would probably be a bit of a mess (requiring a fallback to toArray on BaseVector), an optional parameter might be the cleanest approach.



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