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Tomas Corral
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Add Prototype, Builder and add another implementation for Singleton
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‎Builder/.DS_Store‎

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‎Builder/1/.DS_Store‎

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‎Builder/1/index.html‎

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<html>
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<head>
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<link type="text/css" rel="stylesheet" href="../../statics/css/style.css"/>
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<title>Builder Pattern</title>
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</head>
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<body>
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<div id="source">
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<h2>Source</h2>
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<pre>
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import MealBuilder from './MealBuilder';
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var mealBuilder = new MealBuilder();
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var veganMeal = mealBuilder.prepareVeganMeal();
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veganMeal.showItems();
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console.log(`Vegan meal cost: $${veganMeal.getCost()}`);
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var nonVeganMeal = mealBuilder.prepareNonVeganMeal();
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nonVeganMeal.showItems();
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console.log(`Non vegan meal cost: $${nonVeganMeal.getCost()}`);
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var deluxeMeal = mealBuilder.prepareDeluxeMeal();
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deluxeMeal.showItems();
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console.log(`Deluxe meal cost: $${deluxeMeal.getCost()}`);
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</pre>
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</div>
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<div id="console">
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<h2>Console</h2>
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<ul></ul>
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<h1>Builder</h1>
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</div>
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<script type="text/javascript" src="../../statics/js/utils.js"></script>
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<script type="text/javascript" src="dist/scripts/main.js"></script>
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</body>
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</html>

‎Builder/1/scripts/Item.js‎

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class Item {
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get name() {
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throw new Error('This method should be implemented');
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}
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get packing() {
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throw new Error('This method should be implemented');
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}
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get price() {
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throw new Error('This method should be implemented');
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}
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}
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export default Item;

‎Builder/1/scripts/Meal.js‎

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const itemList = new WeakMap();
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class Meal {
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get list() {
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if(!itemList.get(this)) {
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itemList.set(this, []);
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}
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return itemList.get(this);
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}
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addItem(item) {
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this.list.push(item);
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}
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getCost() {
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return this.list.reduce((accum, item) => {
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accum += item.price;
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return accum;
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}, 0);
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}
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showItems() {
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this.list.forEach((item) => {
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console.log(`Item: ${item.name}, Packing: ${item.packing.pack()}, Price: $${item.price}`);
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});
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}
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}
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export default Meal;

‎Builder/1/scripts/MealBuilder.js‎

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import Meal from './Meal';
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import VeganBurger from './items/burgers/VeganBurger';
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import BeefBurger from './items/burgers/BeefBurger';
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import KobeBurger from './items/burgers/KobeBurger';
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import Water from './items/drinks/Water';
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import Coke from './items/drinks/Coke';
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import Champagne from './items/drinks/Champagne';
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import Salad from './items/side-dishes/Salad';
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import Fries from './items/side-dishes/Fries';
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import Crudettes from './items/side-dishes/Crudettes';
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class MealBuilder {
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prepareVeganMeal() {
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var meal = new Meal();
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meal.addItem(new VeganBurger());
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meal.addItem(new Water());
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meal.addItem(new Salad());
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return meal;
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}
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prepareNonVeganMeal() {
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var meal = new Meal();
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meal.addItem(new BeefBurger());
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meal.addItem(new Coke());
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meal.addItem(new Fries());
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return meal;
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}
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prepareDeluxeMeal() {
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var meal = new Meal();
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meal.addItem(new KobeBurger());
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meal.addItem(new Champagne());
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meal.addItem(new Crudettes());
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return meal;
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}
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}
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export default MealBuilder;

‎Builder/1/scripts/Packing.js‎

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class Packing {
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pack() {
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throw new Error('This method should be implemented');
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}
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}
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export default Packing;

‎Builder/1/scripts/items/Burger.js‎

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import Wrapper from '../packing/Wrapper';
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import Item from '../Item';
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class Burger extends Item {
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get packing() {
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return new Wrapper();
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}
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}
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export default Burger;

‎Builder/1/scripts/items/Drink.js‎

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import Bottle from '../packing/Bottle';
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import Item from '../Item';
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class Drink extends Item {
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get packing() {
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return new Bottle();
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}
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}
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export default Drink;

‎Builder/1/scripts/items/SideDishes.js‎

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import BoxUp from '../packing/BoxUp';
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import Item from '../Item';
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class SideDishes extends Item {
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get packing() {
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return new BoxUp();
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}
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}
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export default SideDishes;

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