Then we push each country object to the array stored by their respective continents. Using reduce() in place of filter().map() In JavaScript, we use the filter method to filter items stored in an ...

JavaScript’s arrays can hold heterogeneous types, change size on the fly, and readily insert or remove elements. Traditional methods like slice, splice, and push/pop do this by operating on the ...

Arrays are wonderful and a very particular type in JavaScript. There are many useful built-in properties and methods that will help you resolve any task which involves this kind of type.