06.js

// Add property to each object in array

// Write a function that takes an array of objects and a string as arguments
// Add a property with key 'continent' and value equal to the string to each of the objects
// Return the new array of objects
// Tipp: try not to mutate the original array

function myFunction(arr, str) {
  arr.map((obj) => (obj.continent = str));
  return arr;

  // arr.forEach(el => el.continent = str);
  // return arr;

  //   for (let key in arr) arr[key] = { ...arr[key], continent: str };
  //   return arr;

  // AUTHOR'S:
  //   return arr.map((obj) => ({ ...obj, continent: str }));
}

console.log(
  myFunction(
    [
      { city: "Tokyo", country: "Japan" },
      { city: "Bangkok", country: "Thailand" },
    ],
    "Asia"
  )
); // [{ city: 'Tokyo', country: 'Japan', continent: 'Asia' }, { city: 'Bangkok', country: 'Thailand', continent: 'Asia' }]

console.log(
  myFunction(
    [
      { city: "Stockholm", country: "Sweden" },
      { city: "Paris", country: "France" },
    ],
    "Europe"
  )
); // [{ city: 'Stockholm', country: 'Sweden', continent: 'Europe' }, { city: 'Paris', country: 'France', continent: 'Europe' }]