The inventory management system of your favorite local grocery store has broken down, and it has been a real headache for the owner to figure out. Luckily, you're around to offer your services!
Complete the functions in index.js according to the provided JSDoc.
Tip
The goal is for you to complete all the functions with array methods, but if you're feeling stuck, try to solve the problem with a loop!
Warning
You may have noticed that there is no provided test suite this time.
Testing your code manually with node or the browser is still an important
skill to have! You won't always be given tests, especially if you're tasked with
writing new code.
Please submit the link to your public GitHub repository.