when was array.map introduced code example

Example 1: how to use the map method in javascript

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

const bigNumbers = numbers.map(number => {
  return number * 10;
});

Example 2: javascript map over new array

// With ES6, you can do this:

[...Array(10)].map((a, b) => a)