ianmcook commented on a change in pull request #11159:
URL: https://github.com/apache/arrow/pull/11159#discussion_r709249165
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File path: docs/source/cpp/compute.rst
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@@ -1490,6 +1492,9 @@ Structural transforms
in the list array is appended to the output. Nulls in the parent list array
are discarded.
+* \(3) For each value in the list child array, the value at index is appended
+ to the output. Nulls in the parent list array are mapped into nulls.
Review comment:
I think this is clearer. I think it is not necessary to explicitly say
anything about nulls here.
```suggestion
* \(3) Output is an array of the same length as the input list array. The
output values are the values at the specified index of each child list.
```
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