Data Abstraction Hacks

Popcorn Hack #1

Create a child class of the class Appliance, and call it’s name() function

%%js 
class Appliance {
    constructor(name) {
        this.name = name;
    }
    getName() {
        return "I am a " + this.constructor.name + " and my model is " + this.name;
    }
}

// Below this name the class and cause it to inherit from the Appliance class
class Microwave extends Appliance {
    constructor(name) {
        super(name);
    }
}

var myMicrowave = new Microwave("Panasonic");
console.log(myMicrowave.getName());

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Popcorn Hack #2

Create child classes of the product class with items, and add parameters depending on what it is. An example is provided of a bagel.

%%js
class Product {
    constructor(price, size, taxRate, weight) {
        this.price = price;
        this.size = size;
        this.taxRate = taxRate;
        this.weight = weight;
    }   
    getPrice() {
        return this.price + this.taxRate * this.price;
    }
    product() {
        const className = this.constructor.name.toLowerCase();
        return "You are ordering a " + className + " with a price of " + this.getPrice() + " dollars, a size of " + this.size + " and a weight of " + this.weight + " grams.";
    }
}

class Bagel extends Product {
    constructor(price, size, taxRate, weight, flavor, isToasted) {
        super(price, size, taxRate, weight);
        this.flavor = flavor;
        this.isToasted = isToasted;
    }
    getPrice() {
        return super.getPrice() * this.size;
    }
    product() {
        return super.product() + " It has a flavor of " + this.flavor + " and it is " + (this.isToasted ? "toasted" : "not toasted") + ".";
    }
}

var sesameBagel = new Bagel(1.5, 2, 0.07, 100, "sesame", true);
console.log(sesameBagel.product());

class Apple extends Product {
    constructor(price, size, taxRate, weight, variety, isOrganic) {
        super(price, size, taxRate, weight);
        this.variety = variety;
        this.isOrganic = isOrganic;
    }
    product() {
        return super.product() + " It is a " + this.variety + " variety and it is " + (this.isOrganic ? "organic" : "not organic") + ".";
    }
}

var galaApple = new Apple(0.5, 1, 0.07, 150, "Gala", true);
console.log(galaApple.product());

class Coffee extends Product {
    constructor(price, size, taxRate, weight, roast, isDecaf) {
        super(price, size, taxRate, weight);
        this.roast = roast;
        this.isDecaf = isDecaf;
    }
    product() {
        return super.product() + " It is a " + this.roast + " roast and it is " + (this.isDecaf ? "decaffeinated" : "not decaffeinated") + ".";
    }
}

var darkRoastCoffee = new Coffee(3.0, 1, 0.07, 250, "dark", false);
console.log(darkRoastCoffee.product());

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