Ian Cook created ARROW-14209:
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Summary: [R] Allow multiple arguments to n_distinct()
Key: ARROW-14209
URL: https://issues.apache.org/jira/browse/ARROW-14209
Project: Apache Arrow
Issue Type: Improvement
Components: R
Reporter: Ian Cook
Fix For: 7.0.0
ARROW-13620 and ARROW-14036 added support for the {{n_distinct()}} in function
in the dplyr verb {{summarise()}} but only with a single argument. Add support
for multiple arguments to {{n_distinct()}}. This should return the number of
unique combinations of values in the specified columns/expressions.
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