kou opened a new issue, #36008:
URL: https://github.com/apache/arrow/issues/36008
### Describe the enhancement requested
It's a convenient method:
```ruby
class Parquet::ArrowFileReader
def each_row_group
return to_enum(__method__) {n_row_groups} unless block_given?
n_row_groups.times do |i|
yield(read_row_group(i))
end
end
end
```
### Component(s)
Parquet, Ruby
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