Classes & Methods Homework


Homework!

As you read through this, notice the new content introduced. We encourage you to do your own research (this can be Google, ChatGPT, documentation, etc.). Here, we introduce the _ property (memory safety), extends keyword, and super() method.

To complete the homework, implement the TODO: comments. The example usage should guide you and work if all implementation is done correctly. Have fun!

If anything simply cannot go wrong, it will anyway.

%%js

class Aircraft {
    // Constructor
    constructor(model, capacity, range) {
        this._model = model; // _model is a convention to indicate that it's a private property
        this._capacity = capacity; // _capacity is a convention to indicate that it's a private property
        this._range = range; // _range is a convention to indicate that it's a private property
    }

    // Getter for model
    get model() {
        return this._model;
    }

    // Setter for model
    set model(newModel) {
        this._model = newModel;
    }

    // Getter for capacity
    get capacity() {
        return this._capacity;
    }

    // Setter for capacity
    set capacity(newCapacity) {
        this._capacity = newCapacity;
    }

    // Getter for range
    get range() {
        // TODO: get the range
    }

    // Setter for range
    set range(newRange) {
        // TODO: set the range
    }

    // Method to display aircraft details
    displayDetails() {
        // TODO: display the details (model, capacity, range)
    }

    // Static method to compare range
    static compareRange(aircraft1, aircraft2) {
        return aircraft1.range - aircraft2.range;
    }
}

// Example usage
let boeing = new Aircraft('Boeing 747', 416, 13800);
let airbus = new Aircraft('Airbus A380', 853, 15700);

console.log(boeing.displayDetails());
console.log(airbus.displayDetails());
console.log(`Range difference: ${Aircraft.compareRange(boeing, airbus)} km`);

// New content in the HW! Lo and behold, the FighterJet class! 
// For 1) do research. What does the extend keyword do in JavaScript?
// Here's a quick rundown if you're in a hurry: 
// the extends keyword creates a child class (FighterJet) that inherits from a parent class (Aircraft).
class FighterJet extends Aircraft {
    constructor(model, capacity, range, speed) {
        super(model, capacity, range); // We call the parent class constructor with super
        this._speed = speed;
    }

    // TODO: Getter for speed
    // Remember to use the _speed property for memory safety

    // TODO: Setter for speed
    // Remember to use the _speed property and add a function paramater.

    // TODO: Method to display fighter jet details (model, capacity, range, speed)
}

// Example usage
let f16 = new FighterJet('F-16', 1, 4220, 2400);
let f22 = new FighterJet('F-22', 1, 2960, 2410);

console.log(f16.displayDetails());
console.log(f22.displayDetails());
console.log(`Range difference: ${Aircraft.compareRange(f16, f22)} km`);
<IPython.core.display.Javascript object>

If you perceive that there are four possible ways in which a procedure can go wrong, and circumvent these, then a fifth way, unprepared for, will promptly develop.

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