:sig
void DValue::set_array()

:params
return value : none

:see
0_DValue
2_DValue_push
2_DValue_is_list

:content
Clears the value and makes it an empty list-shaped map. Subsequent `push()` calls append numeric keys starting at `0`.

```cpp
DValue rows; rows.set_array(); rows.push(row);
```