What is the main purpose of the Map method and how is it used when working with data collections?

The map method is used to transform each element of a collection (such as an array) into a new element, forming a new array of the same length. The main task is to apply a function to each element of the original array and obtain an array of results.

Example in JavaScript:

const numbers = [1, 2, 3, 4];
const squares = numbers.map(x => x * x);
console.log(squares); // [1, 4, 9, 16]

This is useful when working with data, to transform or extract specific values from a collection without modifying the original.