: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`.


:example
DValue list;
list.set_array();
DValue item; item.set("first");
list.push(item);
print("is_list=", list.is_list() ? "yes" : "no", " count=", list.keys().size(), "\n");