Answers for "javascript map keys in object"

.map for object javscript

var myObject = { 'a': 1, 'b': 2, 'c': 3 };

Object.keys(myObject).map(function(key, index) {
  myObject[key] *= 2;
});

console.log(myObject);
// => { 'a': 2, 'b': 4, 'c': 6 }

object key map 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]