This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import 'package:flutter/cupertino.dart'; | |
import 'package:flutter/material.dart'; | |
import 'package:url_launcher/link.dart'; | |
// Link | |
class LinkerDemo extends StatelessWidget { | |
const LinkerDemo({Key key}) : super(key: key); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
class Person extends ChangeNotifier { | |
Person({this.name, this.age}); | |
final String name; | |
int age; | |
void increaseAge() { | |
this.age++; | |
notifyListeners(); | |
} | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
class HomeRepositoryImpl extends HomeRepository { | |
@override | |
Future<CarouselModel> fetchData() async { | |
await Future.delayed(const Duration(milliseconds: 1800)); | |
final resp = await rootBundle.loadString('assets/data/first_screen.json'); | |
return carouselModelFromJson(resp); | |
} | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
abstract class PackageInfoService { | |
Future<String> appVersion(); | |
} | |
class PackageInfoServiceImpl implements PackageInfoService { | |
@override | |
Future<String> appVersion() async { | |
final packageInfo = await PackageInfo.fromPlatform(); | |
String version = packageInfo.version; | |
String build = packageInfo.buildNumber; | |
return 'v$version ($build)'; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
late HomeViewModel viewModel; | |
@override | |
void initState() { | |
viewModel = Provider.of<HomeViewModel>(context, listen: false); | |
WidgetsBinding.instance.addPostFrameCallback((_) { | |
viewModel.fetchData(); | |
}); | |
super.initState(); | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Future<void> main() async { | |
setupLocator(); | |
runApp( | |
MultiProvider( | |
providers: [ | |
ChangeNotifierProvider( | |
create: (_) => HomeViewModel(repo: locator<HomeRepo>()), | |
), | |
], |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
final GetIt locator = GetIt.instance; | |
void setupLocator() { | |
locator.registerFactory<HomeRepository>(() => HomeRepoImpl()); | |
// Alternatively you could write it | |
GetIt.I.registerFactory<HomeRepository>(HomeRepoImpl()); | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
% docker exec -it redis redis-cli | |
127.0.0.1:6379> set key value | |
OK | |
127.0.0.1:6379> get key | |
"value" | |
127.0.0.1:6379> del key | |
(integer) 1 | |
127.0.0.1:6379> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
srv := &http.Server{ | |
Handler: router, | |
Addr: ":8081", | |
WriteTimeout: 15 * time.Second, | |
ReadTimeout: 15 * time.Second, | |
} | |
log.Fatal(srv.ListenAndServe()) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
host := "127.0.0.1" | |
port := "5432" | |
user := "user" | |
password := "password" | |
dbname := "dbname" | |
psqlInfo := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable", host, port, user, password, dbname) | |
result, err := sql.Open("postgres", psqlInfo) | |
if err != nil { | |
log.Fatalf("Error in connection : %s", err) | |
} |
OlderNewer