Vue.js 3 and Firebase for Beginners - Checking for Duplicate Basket Items

The video tutorial addresses the issue of adding duplicate items to a basket in a JavaScript application. It explains how to use the JavaScript find method to check if an item already exists in the basket by matching both the name and size of the pizza. If a match is found, the quantity of the existing item is increased instead of adding a new item. The tutorial includes testing the solution to ensure it works correctly.

What issue arises when adding the same pizza multiple times to the basket?

• The basket automatically removes the pizza.

• The pizza size changes.

• The pizza is added as a new item instead of increasing the quantity.

• The basket crashes.

Which JavaScript method is used to check if a pizza already exists in the basket?

• map

• reduce

• filter

• find

What two attributes are checked to determine if a pizza already exists in the basket?

• Pizza toppings and size

• Pizza name and size

• Pizza size and crust type

• Pizza name and price

What happens when a matching pizza is found in the basket?

• The basket is cleared.

• The pizza is duplicated in the basket.

• The quantity of the pizza is increased by one.

• The pizza is removed from the basket.

What should be done after increasing the quantity of an existing pizza in the basket?

• Log out of the application.

• Return out of the function to prevent adding a duplicate.

• Add another pizza to the basket.

• Change the pizza size.