evaisse

import 'dart:convert';
import 'dart:math';
import 'dart:typed_data';

import 'package:basic_utils/basic_utils.dart';
import 'package:encrypt/encrypt.dart';
// ignore: depend_on_referenced_packages
import 'package:crypto/crypto.dart';
import 'package:flutter/foundation.dart' as flutter;
import 'package:pointycastle/export.dart';

evaisse

// Définition d'une classe scellée pour représenter un résultat
// Sealed class : https://dart.dev/language/class-modifiers#sealed
sealed class ASealedClass {}
// cas 1
class Success extends ASealedClass {}
// cas 2
class Failure extends ASealedClass {}

/// sous la forme d'un enum
enum AnEnum { success, error }

evaisse

void main() {
  
  dynamic myDynamicValue = null;
 
  myDynamicValue.length;
  
  Object? myTypedValue = myDynamicValue;
  
  myTypedValue.length; // that's helpful
  

evaisse

class Generic<T> {
  final T that;
  Generic(this.that);
}

class TypedGeneric<T extends Object> {
  final T that;
  TypedGeneric(this.that);
}

evaisse

/// Cast Or provide default value (optional or safely defaulted)
/// by the way, "castor" is the french word for beaver...
/// ```
///           ___
///          /. .\
///         =\_t_/=
///           [|]
/// ```
///
extension CastOrExtension<T extends Object> on T {

evaisse

class Cool {
  final int count;
  Cool({ int? count = 20 }): this.count = count ?? 20;
}

class NotCool {
  final int count;
  NotCool({ this.count = 20 });
}

evaisse

console.log('coucouc');

evaisse

enum ManyGenerics<T> {
  myInt<int>(defaultValue: 3),
  myString<String>(defaultValue: 'hello');

  final T defaultValue;

  const ManyGenerics({required this.defaultValue});
}

typedef WrappedAccess = ({ManyGenerics val});

evaisse

enum ScoreLevel {
  rookie, 
  maestro
}

sealed class MyState {
  
}

evaisse

import 'package:flutter/material.dart';

///
/// @see https://api.flutter.dev/flutter/widgets/ValueListenableBuilder-class.html
/// @see https://api.flutter.dev/flutter/foundation/ValueNotifier-class.html
///
ValueNotifier<int> counter = ValueNotifier<int>(0);

void main() {
  runApp(const MyApp());