set_city
Description:
Sets this's location to a city with the given code, and given city_name, if non-
null.
If there is no matching city, sets this's location to null.
Parameters:
| this | |
| city_name |
the city name, or null |
| code |
the METAR station code |
Returns:
|
true if this's location could be set to a matching city, false otherwise. |