mapa de chave de objeto JavaScript
const object = {1: 'a', 2: 'b', 3: 'c'};
// convert to the array keys
let array =Object.keys(object);
// index is based on zero
let newArray = array.map((item, index) => {
console.log(`Item => "${item}", Index => ${index}`);
return item * 2;
});
// newArray will be [2, 4, 6]
Poor Platypus