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https://issues.apache.org/jira/browse/ARROW-5745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17286013#comment-17286013
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Antoine Pitrou commented on ARROW-5745:
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I think that unfortunately the ship has sailed here. Changing the semantics of
{{MapArray::values()}} would probably annoy a lot of users.
> [C++] properties of Map(Array|Type) are confusingly named
> ---------------------------------------------------------
>
> Key: ARROW-5745
> URL: https://issues.apache.org/jira/browse/ARROW-5745
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Ben Kietzman
> Assignee: Ben Kietzman
> Priority: Major
> Fix For: 4.0.0
>
>
> In the context of ListArrays, "values" indicates the elements in a slot of
> the ListArray. Since MapArray isa ListArray, "values" indicates the same
> thing and the elements are key-item pairs. This naming scheme is not
> idiomatic; these *should* be called key-value pairs but that would require
> propagating the renaming down to ListArray.
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