03. Store Provision js fundamentals

function solve(...args) {
  const localStoreStock = args[0];
  const orderedStock = args[1];

  const products = {};

  localStoreStock.forEach((element, index) => {
    if (index % 2 === 0) {
      products[element] = Number(localStoreStock[index + 1]);
    }
  });

  orderedStock.forEach((element, index) => {
    if (products[element] !== undefined) {
      products[element] += Number(orderedStock[index + 1]);
    } else if (index % 2 === 0) {
      products[element] = Number(orderedStock[index + 1]);
    }
  });

  Object.keys(products).map((element) => console.log(`${element} -> ${products[element]}`));
}