i have errors in Ln12 import 'package:flutter/material.dart'; import 'package:google_maps_flutter/google_maps_flutter.dart'; import '../models/place.dart'; class MapScreen extends StatefulWidget { final PlaceLo
The second mechanism really says two things - first, it tells the compiler that this parameter is optional, meaning the user does not have to specify an argument in this position. Second, it gives the compiler the value to use when the user does not specify an argument for the parameter. ...
'Bob','Carol'];constperson=people.find(name=>name.startsWith(letter));returnhello(person);// This is the error:// Argument of type 'string | undefined' is not assignable to// parameter of type 'string'.// Type 'undefined' is not assignable to type...
Are they required in your world to call up the author of B on the phone and ask them to please ship them a new version of B that makes the method have an optional parameter? That's not going to fly. What iftwopeople call up the author of B, and one of them wants the default t...
This class provides a special constructor that takes a condition as the first parameter. If the condition is true, an object of type boost::optional is initialized with the second parameter. If the condition is false, an empty object of type boost::optional is created. With is_initialized()...