04. City Markets

function cityMarkets(arr) {
  const markets = {};

  arr.forEach((str) => {
    const [town, product, amountOfSales, priceForOneUnit] = str.split(/[^A-z0-9.\s+]+/g);

    const salesIncome = Number(amountOfSales) * Number(priceForOneUnit);

    if (!Object.prototype.hasOwnProperty.call(markets, town)) {
      markets[town] = [];
      const obj = { product: product.trim(), money: salesIncome };
      markets[town].push(obj);
    } else {
      const obj = { product: product.trim(), money: salesIncome };
      markets[town].push(obj);
    }
  });

  Object.entries(markets).forEach((town) => {
    const [townName, products] = town;

    console.log(`Town - ${townName}`);

    products.forEach((store) => {
      const { product, money } = store;

      console.log(`$$$${product} : ${money}`);
    });
  });
}