This project demonstrates the use of Dart's object-oriented programming features, including abstract classes, mixins, and factory constructors. It also includes utility functions for string manipulation and modularized code to handle different types of vehicles, such as cars and motorbikes.
- Abstract Classes: The project uses the
Vehicleclass as an abstract class with adrive()method to be implemented by various types of vehicles. - Factory Constructors: A factory constructor is used to create instances of different vehicle types based on a string input.
- Mixins: (If applicable in your project for other functionality, like swimming for animals).
- Utility Functions: The project includes a utility function to convert strings to lowercase, which ensures that the type comparison in the factory constructor is case-insensitive.
dart_practice/
├── lib/
│ ├── src/
│ │ ├── models/
│ │ │ └── Animal.dart
│ │ │ └── Car.dart
│ │ │ └── Dolphin.dart
│ │ │ └── Employee.dart
│ │ │ └── Motorbike.dart
│ │ │ └── Person.dart
│ │ │ └── Swimmer.dart
│ │ │ └── Vehicles.dart
│ │ ├── utils/
│ │ │ └── string_utils.dart
│ │ │ └── conditionals.dart
│ │ │ └── divider.dart
│ │ │ └── lists_maps.dart
│ │ │ └── loops.dart
│ │ │ └── operators.dart
│ │ │ └── toLower.dart
│ │ ├── week_one
│ │ │ └── functions.dart
│ │ │ └── main.dart
│ │ ├── week_two
│ │ │ └── functions.dart
│ │ │ └── main.dart
│ │ └── main.dart
├── pubspec.yaml
└── README.md
Make sure you have Dart installed on your machine. You can download it from the official Dart website.
-
Clone this repository:
https://github.com/dart_practice.git
-
Navigate into the project directory:
cd dart_practice -
Run the project:
dart run lib/main.dart
The Vehicle class is an abstract class that includes a factory constructor. Based on the input provided to the constructor, it returns an instance of either the Car or Motorbike class.
Example usage:
Vehicle vehicle = Vehicle('vehicle'); // This returns an instance of Car.
vehicle.drive(); // Output: Driving a car.The project contains a utility function in functions.dart to handle case-insensitive comparisons. It converts any string to lowercase before checking the type of vehicle:
String toLower(String input) {
return input.toLowerCase();
}This function is used in the factory constructor to make the comparison case-insensitive.
Here’s an example of how to create and use a vehicle instance:
void main() {
Vehicle myVehicle = Vehicle('Car');
myVehicle.drive(); // Output: Driving a car.
}If an unsupported type is provided, the constructor throws an error:
Vehicle unknownVehicle = Vehicle('motorbike'); // Throws 'Vehicle type not found'