Learn Basic OOP by Building a Shopping Cart - Step 24

JavaScript
1

Tell us what’s happening:

Back again with another syntax issue.

I am wrapping this in parenthesis. I have also tried adding the end paren after the ||0, but still nothing is working.

Your code so far

<!-- file: index.html -->


/* file: styles.css */


/* file: script.js */
// User Editable Region

  addItem(id, products) {
    const product = products.find((item) => item.id === id);
    const { name, price } = product;
    this.items.push(product);

    const totalCountPerProduct = {};
    this.items.forEach((dessert) => {
      totalCountPerProduct[dessert.id] = (totalCountPerProduct[dessert.id]) + 1 || 0;
    })
  }

// User Editable Region

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Challenge Information:

Learn Basic OOP by Building a Shopping Cart - Step 24

2

you should have the fallback inside these round parenthesis, so that if it is null or undefined then it is replaced with a 0

1 Like
3

const totalCountPerProduct = {};
this.items.forEach((dessert) => {
totalCountPerProduct[dessert.id] = (totalCountPerProduct[dessert.id] + 1 || 0);

Thank you for the suggestion. This fails as well. the hint keeps telling me to wrap totalCountPerProduct[dessert.id] in parenthesis.

4

only the fallback, not the sum.
you add only the fallback into the parenthesis, and then add +1 outside when the value is determined

not required for the step, but important info:

if you have this, and the value is undefined you have undefined +1 || 0 which collapses to 0, when you want instead to have 1 as first value when counting a product

1 Like
5

const totalCountPerProduct = {};
this.items.forEach((dessert) => {
totalCountPerProduct[dessert.id] = (totalCountPerProduct[dessert.id]) + 1 || 0;
Is this the syntax you mean?

6

you still need the fallback, and the fallback only not the sum, inside the parenthesis

8

I finally got it. For those of you wondering. Adding || 0 at the end is not necessarily the end you see in the examples.

9

Solution:
removed by moderator

10

It is great that you solved the challenge, but instead of posting your full working solution, it is best to stay focused on answering the original poster’s question(s) and help guide them with hints and suggestions to solve their own issues with the challenge.

We are trying to cut back on the number of spoiler solutions found on the forum and instead focus on helping other campers with their questions and definitely not posting full working solutions.

1 Like
11

Hi. Thank you for the explanation here. Got the idea and passed out.

1 Like
12

solution removed by mod

13

This is the 2nd time, please stop posting solution code.

It is great that you solved the challenge, but instead of posting your full working solution, it is best to stay focused on answering the original poster’s question(s) and help guide them with hints and suggestions to solve their own issues with the challenge.

We are trying to cut back on the number of spoiler solutions found on the forum and instead focus on helping other campers with their questions and definitely not posting full working solutions.