R-JunmingChen commented on code in PR #37418:
URL: https://github.com/apache/arrow/pull/37418#discussion_r1333749481
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cpp/src/arrow/compute/api_vector.h:
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@@ -586,6 +586,20 @@ Result<Datum> DictionaryEncode(
const DictionaryEncodeOptions& options =
DictionaryEncodeOptions::Defaults(),
ExecContext* ctx = NULLPTR);
+/// \brief Compact a dictionary array
+///
+/// The output removes unused values in dictionary from the input.
+/// The function assumes every indice is effective.
Review Comment:
Sure, I change to the following words:
The function assumes every indice has its corresponding value in dictionary.
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