map()

The map() function is a higher-order array function in JavaScript and TypeScript. It takes an array and a callback function as arguments, and it returns a new array with the results of the callback function applied to each element in the original array. In this example, the map() function takes an array of numbers, numbers, and returns a new array, doubledNumbers, with each element of numbers doubled.

const numbers: number[] = [1, 2, 3, 4, 5];

const doubledNumbers = numbers.map(number => number * 2);

console.log(doubledNumbers); 
// Output: [2, 4, 6, 8, 10]