Transforming Arrays

Sometimes you will want to apply the same operation to each item in an array, creating a new array with the changed items. You can do this using map(). Example: function double(number) { return number * 2; } const numbers = [5, 2, 7, 6]; const doubled = numbers.map(double); console.log(doubled); // [ 10, 4, 14, 12 ] Filtering Arrays Sometimes you'll want to create a new array containin...