Brian Hulette created ARROW-3523:
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Summary: [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
Reporter: Brian Hulette
Fix For: JS-0.5.0
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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