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https://issues.apache.org/jira/browse/ARROW-3523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17523975#comment-17523975
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Dominik Moritz commented on ARROW-3523:
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Is this still an issue?
> [JS] Assign dictionary IDs in IPC writer rather than on creation
> ----------------------------------------------------------------
>
> Key: ARROW-3523
> URL: https://issues.apache.org/jira/browse/ARROW-3523
> Project: Apache Arrow
> Issue Type: Improvement
> Components: JavaScript
> Reporter: Brian Hulette
> Priority: Major
>
> Currently the JS implementation relies on on the user assigning IDs for
> dictionaries that they create, we should do something like the C++
> implementation, which uses a dictionary id memo to assign and retrieve
> dictionary ids in the IPC writer
> (https://github.com/apache/arrow/blob/master/cpp/src/arrow/ipc/metadata-internal.cc#L495).
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