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code.dart

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+// Classes +
+// Methods +
+// Enums +
+// Loops +
+// Generics (можно использовать List<>) +
+// Anonymous functions +
+// Future +
+// extension +
+
+
+void main () async {
+  WorkScedule workScedule = WorkScedule();
+  workScedule.push(new Worker('Слава', workDay: WeekDay.Wednesday, salary_per_day: 1500));
+  workScedule.push(new Worker('Артём', workDay: WeekDay.Monday, salary_per_day: 2000));
+  workScedule.push(new Worker('Лера', workDay: WeekDay.Tuesday, salary_per_day: 2500));
+  workScedule.push(new Worker('Саша', workDay: WeekDay.Thursday));
+
+  for (var worker in await workScedule.getWorkersAsync())
+    print('${worker.name} работает в ${worker.workDay.name} и получвет в месяц ${worker.fullSalary(worker.salary_per_day)}');
+}
+
+class Worker {
+  final String name;
+  final WeekDay workDay;
+  final int salary_per_day;
+  
+  Worker(this.name, { this.workDay = WeekDay.Monday, this.salary_per_day = 1000 });
+  
+  final fullSalary = (salary_per_day) => salary_per_day*4+7700;
+} 
+
+class WorkScedule{
+  List<Worker> _workers = [];
+
+  void push(Worker worker){
+    _workers.add(worker);
+  }
+
+  Future<List<Worker>> getWorkersAsync() async {
+    await Future.delayed(Duration(seconds: 5));
+    _workers.sort((a, b) => a.workDay.order.compareTo(b.workDay.order));
+    return _workers;
+  }
+
+}
+
+enum WeekDay {
+  Monday,
+  Tuesday,
+  Wednesday,
+  Thursday,
+  Friday,
+  Saturday,
+  Sunday
+}
+
+extension WeekDayX on WeekDay{
+  String get name {
+    switch (this) {
+      case WeekDay.Monday:
+        return 'Понедельник';
+      case WeekDay.Tuesday:
+        return 'Вторник';
+      case WeekDay.Wednesday:
+        return 'Среда';
+      case WeekDay.Thursday:
+        return 'Четверг';
+      case WeekDay.Friday:
+        return 'Пятница';
+      case WeekDay.Saturday:
+        return 'Суббота';
+      case WeekDay.Sunday:
+        return 'Воскресенье';
+    }
+  }
+
+  int get order {
+    switch (this) {
+      case WeekDay.Monday:
+        return 1;
+      case WeekDay.Tuesday:
+        return 2;
+      case WeekDay.Wednesday:
+        return 3;
+      case WeekDay.Thursday:
+        return 4;
+      case WeekDay.Friday:
+        return 5;
+      case WeekDay.Saturday:
+        return 6;
+      case WeekDay.Sunday:
+        return 7;
+    }
+  }
+}