Build an Inventory Management Program - Build an Inventory Management Program

JavaScript
1

Tell us what’s happening:

TypeError: “Cannot read properties of undefined (reading ‘quantity’)”

having issues adding to an existing quantity of an object

Your code so far

let inventory = [
  
];



function findProductIndex(name) {
  let productName = name.toLowerCase();
  for (let i = 0; i < inventory.length; i++) {
    if (inventory[i].name === productName) {
      return productName;
    }
  }
  return -1;
}


function addProduct(obj) {
 
  let productStr = obj.name.toLowerCase();
  let productIndex = findProductIndex(productStr);
  
  if (productIndex !== -1) {
    inventory[productIndex].quantity += obj.quantity;
    console.log(`${productStr} quantity updated`);
  } else {
    inventory.push({ name: productStr, quantity: obj.quantity });
    console.log(`${productStr} added to inventory`);
  }
}


console.log(findProductIndex("flour"));
console.log(findProductIndex("floUr"));
addProduct({name: "FLOUR", quantity: 5});
addProduct({name: "FLOUR", quantity: 5});
console.log(inventory);

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Challenge Information:

Build an Inventory Management Program - Build an Inventory Management Program

2

You should create a function named findProductIndex that takes the product name as its argument and returns the index of the corresponding product object inside the inventory array.

What should findProductIndex() return?

4

the name of the object in lowercase or -1

5

Where are you reading that you should return the name of the object?