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https://issues.apache.org/jira/browse/ARROW-1559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16252904#comment-16252904
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ASF GitHub Bot commented on ARROW-1559:
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pcmoritz commented on issue #1266: ARROW-1559: [C++] Add Unique kernel and
refactor DictionaryBuilder to be a stateful kernel
URL: https://github.com/apache/arrow/pull/1266#issuecomment-344477903
+1 on the mapbox variant
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> [C++] Kernel implementations for "unique" (compute distinct elements of array)
> ------------------------------------------------------------------------------
>
> Key: ARROW-1559
> URL: https://issues.apache.org/jira/browse/ARROW-1559
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Assignee: Uwe L. Korn
> Labels: Analytics, pull-request-available
> Fix For: 0.8.0
>
>
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