:sig
void DValue::clear()

:params
return value : none

:see
0_DValue
2_DValue_set_array

:content
Clears the value into an empty map-shaped value and resets its array index. Unlike `set_array()`, this does not set list mode.


:example
DValue u;
u["a"] = "1"; u["b"] = "2";
u.clear();
print("after clear, has a: ", u.has("a") ? "yes" : "no", "\n");