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add: exercises class 6 #57

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13 changes: 13 additions & 0 deletions alumnos/crc/ejercicios-clase-6/aquaman.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
const heroes = ['batman', 'superman', 'wonderwoman', 'aquaman'];

const handler = {
set: (object, property, value) => {
if (typeof value === 'string' && value.toLowerCase() === 'aquaman') {
throw Error('Aquaman ya existe')
}
return Reflect.set(object, property, value)
}
}

const heroesProxy = new Proxy(heroes, handler)
heroesProxy.push('ramdomheroe')
65 changes: 65 additions & 0 deletions alumnos/crc/ejercicios-clase-6/shoppingCar.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,65 @@
/**
* Nuestro carrito de la compra es bastante inteligente, pero no estaría
* mal que lo fuese aún más. Crear un metodo anade que reciba un
* producto y lo añada al carrito. Para ello Hay que tener en cuenta las siguientes cuestiones:

- Si un producto ya existe en el carrito hay que aumentar la cantidad, no duplicarlo.
- Si el precio del nuevo producto es menor, será este el que predomine.
- La cantidad por defecto será 1, pero si hubiera más habrá que sumarlos.
- Hay que validar los tipos, el nombre del producto es un string,
la cantidad es un entero y el precio es un número. En caso de que
se introduzca un producto con un tipo inválido se debe lanzar una excepción.
*/

class Product {
amount = 1
name = ''
price = 0

incrementAmount() {
++this.amount
}

newPrice(price) {
if (price < this.price) this.price = price
}
}

const handler = {
set: (object, property, value) => {
if (typeof value !== 'number' && property === 'price') {
throw Error(`Number nedeed in property:${property}`)
}

if (typeof value !== 'string' && property === 'name') {
throw Error(`String nedeed in property:${property}`)
}

if (!Number.isInteger(value) && property === 'amount') {
throw Error(`Integer nedeed in property:${property}`)
}
return Reflect.set(object, property, value)
}
}

const shoppingCar = []

function setProductInShoppingCar(myProduct) {
const productInShoppingCar = shoppingCar.find(product => product.name === myProduct.name)
if (productInShoppingCar) {
productInShoppingCar.incrementAmount()
productInShoppingCar.newPrice(myProduct.price)
} else {
const productProxy = new Proxy(new Product(), handler)
productProxy.name = myProduct.name
productProxy.price = myProduct.price
shoppingCar.push(productProxy)
}
}
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Me mola mucho tu solución, sólo una cosa, podrías basarte en el carrito que hemos usado en otros ejercicios y delegar todas las comprobaciones en el proxy? con eso ya te lo tendrías perfecto 👏



setProductInShoppingCar({ name: 1, price: 19 }) // -> show error message "String nedeed in property:name"
setProductInShoppingCar({ name: 'randomproduct', price: 'qwe' }) // -> show error message "Number nedeed in property:price"
setProductInShoppingCar({ name: 'cookies', price: 19 })
setProductInShoppingCar({ name: 'cookies', price: 12 })
setProductInShoppingCar({ name: 'watermelon', price: 2 })