Method convert

ruby/red-arrow/ext/arrow/values.cpp:102–117

    private:
      template <typename ArrayType>
      void convert(const ArrayType& array) {
        const auto n = array.length();
        if (array.null_count() > 0) {
          for (int64_t i = 0, ii = row_offset_; i < n; ++i, ++ii) {
            auto value = Qnil;
            if (!array.IsNull(i)) {
              value = convert_value(array, i);
            }
            rb_ary_store(values_, ii, value);
          }
        } else {
          for (int64_t i = 0, ii = row_offset_; i < n; ++i, ++ii) {
            rb_ary_store(values_, ii, convert_value(array, i));
          }
        }
      }

      // Destination for converted values.
      VALUE values_;