Homework

JavaScript Classes and Methods - Interactive Homework

In this notebook, you will learn about classes and methods in JavaScript. After the lesson, complete the tasks by editing the code cells.

What are Classes and Methods?

Class: A blueprint for creating objects with properties and methods.
Method: A function inside a class that defines an object’s behavior.

Example: Class for food

Below is an example of a JavaScript class for creating different foods. The class has:

A constructor to initialize properties (brand and model).
Two methods (displayInfo and start) to define behaviors.

%%js
// Example: A Class for Cars
class Car {
  constructor(brand, model) {
    this.brand = brand; // Property
    this.model = model; // Property
  }

  displayInfo() {
    console.log(`This car is a ${this.brand} ${this.model}.`);
  }

  start() {
    console.log(`${this.brand} ${this.model} is starting...`);
  }
}

// Create an instance of the class
const myCar = new Car("Tesla", "Model S");
myCar.displayInfo();
myCar.start();

<IPython.core.display.Javascript object>

actual hw

%%js
class FridgeGame {
    constructor() {
      // Array of items in the fridge with their scores
      this.fridgeItems = [
        { name: "week-old pizza with mysterious fuzzy spots", score: 2 },
        { name: "fresh avocado that's perfectly ripe", score: 10 },
        { name: "suspicious milk carton from last month", score: 1 },
        { name: "leftover spaghetti that might be moving", score: 3 },
        { name: "chocolate cake hidden behind the vegetables", score: 9 },
        { name: "container of grandma's homemade cookies", score: 10 },
        { name: "takeout box with unknown contents", score: 4 },
        { name: "half-eaten sandwich wrapped in foil", score: 5 },
        { name: "yogurt that expired yesterday", score: 3 },
        { name: "slice of cheese that's more blue than yellow", score: 1 }
      ];
    }
  
    // Method to pick a random item from the fridge
    grabItem() {
      const randomIndex = Math.floor(Math.random() * this.fridgeItems.length);
      return this.fridgeItems[randomIndex];
    }
  
    // Method to classify the find based on its score
    classifyFind(score) {
      if (score >= 8) {
        return "a fantastic find! Jackpot!";
      } else if (score >= 5) {
        return "meh, it'll do";
      } else {
        return "probably better to order takeout...";
      }
    }
  
    // Method to start the game
    play() {
      console.log("Opening the fridge... what will you find?");
      const item = this.grabItem();
      console.log(`You found: ${item.name}!`);
      const feedback = this.classifyFind(item.score);
      console.log(`It is ${feedback} Score: ${item.score}/10`);
    }
  }
  
  // Create an instance of the game
  const fridgeGame = new FridgeGame();
  
  // Start the game
  fridgeGame.play();