View main.dart
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import 'dart:async'; | |
import 'package:flutter_test/flutter_test.dart'; | |
import 'package:rxdart/rxdart.dart'; | |
void main() { | |
test('', () async { | |
// broadcast取ると、expectはtrueになる | |
// BehaviorSubjectでも、expectはtrueになる | |
final controller = StreamController<bool>.broadcast(); |
View state_notifier.dart
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class PackageMetrics extends StateNotifier<AsyncValue<PackageMetricsScore>> { | |
PackageMetrics(this._ref, {required this.packageName}) | |
: super(const AsyncLoading()) { | |
_ref | |
.watch(pubRepositoryProvider) | |
.getPackageMetrics(packageName: packageName) | |
.then((value) => state = AsyncData(value)); | |
} | |
final AutoDisposeRef _ref; |
View async_notifier.dart
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class PackageMetrics | |
// AutoDispose/Family版のAsyncNotifier | |
extends AutoDisposeFamilyAsyncNotifier<PackageMetricsScore, String> { | |
late String _packageName; | |
@override | |
Future<PackageMetricsScore> build(String arg) { | |
_packageName = arg; | |
return ref | |
.watch(pubRepositoryProvider) | |
.getPackageMetrics(packageName: _packageName); |
View main.dart
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import 'package:flutter/material.dart'; | |
import 'package:flutter_riverpod/flutter_riverpod.dart'; | |
import 'package:go_router/go_router.dart'; | |
void main() { | |
runApp( | |
const ProviderScope( | |
child: App(), | |
), | |
); |
View main.dart
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import 'package:quiver/collection.dart'; | |
void main() { | |
// maximumSizeのデフォルトは100 | |
final cache = LruMap<String, int>(maximumSize: 3); | |
cache['a'] = 1; | |
print(cache['a']); // 1 | |
cache['b'] = 2; | |
print(cache['a']); // 1 |
View any_map.diff
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- json['foo'] as Map<String, dynamic>), | |
+ Map<String, dynamic>.from(json['foo'] as Map)), |
View main.dart
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// ignore_for_file: omit_local_variable_types, prefer_final_locals, equal_elements_in_set | |
import 'dart:collection'; | |
void main() { | |
// Setのデフォルト実装は、順番が保たれる LinkedHashSet | |
Set<String> animals = {'dog', 'dog', 'cat'}; | |
// 常に[dog, cat] | |
print(animals.toList()); | |
Set<String> animals2 = HashSet.of(['dog', 'dog', 'cat']); |
View main.dart
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import 'package:firebase_crashlytics/firebase_crashlytics.dart'; | |
import 'package:flutter/foundation.dart'; | |
import 'package:flutter/widgets.dart'; | |
void main() { | |
final crashlytics = FirebaseCrashlytics.instance; | |
// いずれも未キャッチ例外なので `fatal: true`(ネイティブのクラッシュと同等の扱い)が適切 | |
// (例外処理であまり想定してないException受け取った時などは `fatal: false` でも良い感) | |
// オリジナルの`FlutterError.presentError`は呼ばずともログは充分そう | |
FlutterError.onError = crashlytics.recordFlutterFatalError; |
View user.dart
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@freezed | |
class User with _$User { | |
@JsonSerializable() | |
const factory User( | |
@JsonKey() String? displayName, | |
) = _User; | |
const User._(); | |
factory User.fromJson(JsonMap json) => _$UserFromJson(json); | |
} |
View build.yaml
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targets: | |
$default: | |
builders: | |
source_gen|combining_builder: | |
options: | |
ignore_for_file: | |
- type=lint | |
- implicit_dynamic_parameter | |
- implicit_dynamic_type | |
- implicit_dynamic_method |
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