Have you come across a requirement to merge two or more arrays into another array? Let us say, you have two arrays as shown below,
const metrocities = ['Delhi', 'Mumbai','Chennai','Bangalore','Hyderabad']; const smallcities = ['Jamshedpur','Pune','Lucknow','Trivandrum'];
You can merge arrays as using the spread operator as shown below,
let cities = [...metrocities,...smallcities,'Udaipur']; cities.forEach(item=>console.log(item));
As output, you should get items from metrocities and smallcities array with an added item Udaipur. Keep in mind that, this approach created shallow copy of arrray in the resultant array.