JavaScript

Exercises Set 8

const comparePopulationDensity = (firstCountry, secondCountry) => {
  // Write your code below this

  // Write your code above this
};

// Do not delete the below code
const countrySet = {
  countrySet1: ["USA", "India"],
  countrySet2: ["France", "Germany"],
};

Object.values(countrySet).forEach(country => {
  comparePopulationDensity(country[0], country[1]);
});

const comparePopulationDensity = async (firstCountry, secondCountry) => {
  // Write your code below this
  try {
    const [response1, response2] = await Promise.all([
      fetch(`https://restcountries.com/v3.1/name/${firstCountry}`),
      fetch(`https://restcountries.com/v3.1/name/${secondCountry}`)
    ]);

    if (!response1.ok || !response2.ok) {
      console.error("Failed to fetch country data.");
      // once we teach throw, we will update this code to it.
    }

    const [data1, data2] = await Promise.all([response1.json(), response2.json()]);

    const countryData1 = data1[0];
    const countryData2 = data2[0];

    const {
      population: population1,
      area: area1
    } = countryData1;
    const {
      population: population2,
      area: area2
    } = countryData2;

    console.log(`${firstCountry}: Population = ${population1}, Area = ${area1}`);
    console.log(`${secondCountry}: Population = ${population2}, Area = ${area2}`);

    const density1 = population1 / area1;
    const density2 = population2 / area2;

    console.log(`${firstCountry} Population Density: ${density1.toFixed(2)}`);
    console.log(`${secondCountry} Population Density: ${density2.toFixed(2)}`);

    if (density1 > density2) {
      console.log(`${firstCountry} has a higher population density than ${secondCountry}.`);
    } else if (density1 < density2) {
      console.log(`${secondCountry} has a higher population density than ${firstCountry}.`);
    } else {
      console.log(`${firstCountry} and ${secondCountry} have the same population density.`);
    }
  } catch (error) {
    console.error(`Error fetching data: ${error.message}`);
  } finally {
    console.log("Fetch operation completed");
  }
  // Write your code above this
};

// Do not delete the below code
const countrySet = {
  countrySet1: ["India", "USA"],
  countrySet2: ["France", "Germany"],
};

Object.values(countrySet).forEach(country => {
  comparePopulationDensity(country[0], country[1]);
});