This project focuses on object-oriented programming (OOP) in JavaScript using ES6 classes. You will learn how to define and manipulate classes, including adding methods, using static methods, extending classes, and using metaprogramming.
By the end of this project, you should be able to explain the following without the help of Google:
- How to define a Class
- How to add methods to a class
- Why and how to add a static method to a class
- How to extend a class from another
- Metaprogramming and symbols
Read or watch:
- All files will be executed on Ubuntu 18.04 LTS using NodeJS 12.11.x
- Allowed editors: vi, vim, emacs, Visual Studio Code
- All files should end with a new line
- A
README.mdfile at the root of the project folder is mandatory - Your code should use the
.jsextension - Your code will be tested using Jest and the command
npm run test - Your code will be verified against lint using ESLint
- Your code needs to pass all the tests and lint checks (
npm run full-test)
curl -sL https://deb.nodesource.com/setup_12.x -o nodesource_setup.sh
sudo bash nodesource_setup.sh
sudo apt install nodejs -y
nodejs -v # Should output v12.11.1
npm -v # Should output 6.11.3In your project directory, use the provided package.json and run:
npm install{
"scripts": {
"lint": "./node_modules/.bin/eslint",
"check-lint": "lint [0-9]*.js",
"dev": "npx babel-node",
"test": "jest",
"full-test": "./node_modules/.bin/eslint [0-9]*.js && jest"
},
"devDependencies": {
"@babel/core": "^7.6.0",
"@babel/preset-env": "^7.6.0",
"@babel/node": "^7.8.0",
"eslint": "^6.4.0",
"eslint-config-airbnb-base": "^14.0.0",
"eslint-plugin-import": "^2.18.2",
"eslint-plugin-jest": "^22.17.0",
"jest": "^24.9.0"
}
}module.exports = {
presets: [
[
'@babel/preset-env',
{
targets: {
node: 'current',
},
},
],
],
};module.exports = {
env: {
browser: false,
es6: true,
jest: true,
},
extends: [
'airbnb-base',
'plugin:jest/all',
],
globals: {
Atomics: 'readonly',
SharedArrayBuffer: 'readonly',
},
parserOptions: {
ecmaVersion: 2018,
sourceType: 'module',
},
plugins: ['jest'],
rules: {
'max-classes-per-file': 'off',
'no-underscore-dangle': 'off',
'no-console': 'off',
'no-shadow': 'off',
'no-restricted-syntax': [
'error',
'LabeledStatement',
'WithStatement',
],
},
overrides:[
{
files: ['*.js'],
excludedFiles: 'babel.config.js',
}
]
};Ensure all dependencies are installed:
npm installTo run lint checks and tests:
npm run full-testFile: 0-classroom.js
Description:
Define a ClassRoom class. The class should have one attribute named maxStudentsSize (number) and a constructor that accepts a number as an argument and initializes maxStudentsSize with this value.
File: 1-make_classrooms.js
Description:
Create a function named initializeRooms that returns an array of ClassRoom objects. The function should create three instances of the ClassRoom class with the following sizes: 19, 20, and 34.
File: 2-hbtn_course.js
Description:
Define a HolbertonCourse class with the following attributes:
name(String)length(Number)students(Array of Strings)
Implement getters and setters for each attribute. Ensure that:
nameis always a string.lengthis always a number.studentsis always an array of strings.
File: 3-currency.js
Description:
Define a Currency class with the following attributes:
code(String)name(String)
The class should have a constructor that initializes code and name, and the following methods:
displayFullCurrency(): Returns a string in the format:name (code).
File: 4-#.js
Description:
Define a # class with the following attributes:
amount(Number)currency(Currency)
The class should have a constructor that initializes amount and currency, and the following methods:
displayFullPrice(): Returns a string in the format:amount currency_name (currency_code).convertPrice(amount, conversionRate): A static method that converts the price to another currency using the conversion rate.
File: 5-building.js
Description:
Define an abstract Building class with the following attributes:
sqft(Number)
The class should have a constructor that initializes sqft, and a method:
evacuationWarningMessage(): This method should be defined in a subclass (it's an abstract method).
File: 6-sky_high.js
Description:
Define a SkyHighBuilding class that extends Building. The class should have the following attributes:
sqft(Number, inherited)floors(Number)
The class should have a constructor that initializes sqft and floors, and override the evacuationWarningMessage() method to return: "Evacuate slowly the NUMBER_OF_FLOORS floors", where NUMBER_OF_FLOORS is the value of the floors attribute.
File: 7-airport.js
Description:
Define an Airport class with the following attributes:
name(String)code(String)
The class should have a constructor that initializes name and code, and a method:
toString(): Returns a string representation of the airport in the format:[object code], wherecodeis the value of thecodeattribute.
File: 8-hbtn_class.js
Description:
Define a HolbertonClass class with the following attributes:
size(Number)location(String)
The class should have a constructor that initializes size and location, and methods:
valueOf(): Returns the value of thesizeattribute.toString(): Returns the value of thelocationattribute.
File: 9-hoisting.js
Description: In this task, you will fix the provided code so that it works correctly despite issues with hoisting. This involves ensuring that the class definition is correct and follows best practices.
File: 10-car.js
Description:
Define a Car class with the following attributes:
brand(String)motor(String)color(String)
The class should have a constructor that initializes brand, motor, and color, and methods:
cloneCar(): Returns a new object of the class with the same attribute values.
File: 100-evcar.js
Description:
Define an EVCar class that extends Car. The class should have the following attributes:
brand(String, inherited)motor(String, inherited)color(String, inherited)range(String)
The class should have a constructor that initializes brand, motor, color, and range, and override the cloneCar() method to return a new object of the Car class (not EVCar) with the same attribute values.