Build an Inventory Management Program - Build an Inventory Management Program

JavaScript
1

Tell us what’s happening:

Hello, I’m very new to programming/coding so I apologize for the messy code. When I test my addProduct function for steps 8 and 10, I think the console logs the correct outputs, but I fail the tests. Step 9 however passes. Can someone help point me in the correct direction?

Your code so far

let inventory = [];
let soda = {name: "soda", quantity: 5};
let cheese = {name: "cheese", quantity: 3};
let crackers = {name: "crackers", quantity: 10};
let flour = {name: "flour", quantity: 5};
inventory.push(soda, cheese, crackers, flour);

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

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

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

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Challenge Information:

Build an Inventory Management Program - Build an Inventory Management Program

2

Welcome to the forum @jacobbschwarz

Start with this:

  1. You should create a function named removeProduct .

Happy coding

3

Hello again. I did as you suggested and I created the removeProduct function. Afterwards manually performing each test I get the correct output, but most of the tests fail when I run them. I included the outputs as comments at the end of the code.

let inventory = [];

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

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

function removeProduct (productObj) {
  let productName = productObj.name.toLowerCase();
  let productIndex = findProductIndex(productName);
  if (productIndex !== -1) {
    if (inventory[productIndex].quantity >= productObj.quantity) {
      inventory[productIndex].quantity -= productObj.quantity;
      console.log(`Remaining ${productName} pieces: ${inventory[productIndex].quantity}`);
    }
    else {
      console.log(`Not enough ${productName} available, remaining pieces: ${inventory[productIndex].quantity}`);
    }
    if (inventory[productIndex].quantity === 0) {
      inventory.splice(inventory[productIndex], 1);
    }
  }
  else {
    console.log(`${productName} not found`);
  }
};

//Test 8: flour quantity updated
//Test 10: flour added to inventory
//Test 12: flour not found
//Test 13&14: Remaining flour pieces: 15
//            [{name: 'flower', quantity: 15}, {name: 'rice', quantity: 5}]
//Test 15: Remaining flour pieces: 0
//         [{name: 'rice', quantity: 5}]
//Test 16: Not enough flour available, remaining pieces: 5
//         [{name: 'flour', quantity: 5}, {name: 'rice', quantity: 5}]
4

I was able to adjust my removeProduct function to align with the required parameters of the tests. Additionally, after searching for a solution, I found the method I used for my findProductIndex function was not the most efficient. After changing my first function to the more efficient method, and fixing my third function, I have passed all the tests. However, I still do not understand exactly why my first function was the problem. The original funciton I wrote passed its own tests and as far as I can tell gives the same output as the more efficient version.