saliouseck2009

final String response = await rootBundle.loadString('assets/surah.json');
final data = await json.decode(response);

saliouseck2009

{for (var v in products) v.id!: v};

saliouseck2009

 Map<String, dynamic> toJson() {
    List<Map>? orderProducts = this.orderProducts != null
        ? this.orderProducts!.map((i) => i.toJson()).toList()
        : null;

    return {
      'pos_id': posId,
      'sector_id': sectorId,
      'seller_id': sellerId,
      "date": date == null ? null : date!.toIso8601String(),

saliouseck2009

Stack(
        children: [
          Center(
              child: Container(
            height: 200,
            width: 200,
            decoration: new BoxDecoration(
              borderRadius: BorderRadius.circular(20.0),
            ),
            child: FlutterLogo(),

saliouseck2009

//Set the value if it doesn't
//You may be tempted to implement some conditional logic to handle this:

class ShoppingCart {
  final Map<String, int> items = {};

  void add(String key, int quantity) {
    if (items.containsKey(key)) {
      // item exists: update it
      items[key] = quantity + items[key]!;

saliouseck2009

typedef Int2VoidFunc = void Function(int);
// or: typedef void Int2VoidFunc(int arg);
class MyOtherClass {
  final Int2VoidFunc callback;
  MyOtherClass(this.callback);
  void callCallaback() { callback(5); }
}

saliouseck2009

class SimpleBlocObserver extends BlocObserver {
  @override
  void onEvent(Bloc bloc, Object? event) {
    super.onEvent(bloc, event);
    print(event);
  }

  @override
  void onTransition(Bloc bloc, Transition transition) {
    super.onTransition(bloc, transition);

saliouseck2009

void main() {
  runApp(
    BlocProvider(
      create: (context) => MyBloc(),
      child: MyApp(),
    ),
  );
}

@immutable

saliouseck2009

double num1 = double.parse((12.3412).toStringAsFixed(2));
// 12.34

double num2 = double.parse((12.5668).toStringAsFixed(2));
// 12.57

double num3 = double.parse((-12.3412).toStringAsFixed(2));
// -12.34

double num4 = double.parse((-12.3456).toStringAsFixed(2));

saliouseck2009

#division entière
int n = 7 ~/ 3;
résult by excess
int exces = (7/3).ceil();
result by default
int dfault = (7/3).floor();
print(n);
print(exces);
print(dfault);