Can I use map and forEach on objects?

Can I use map and forEach on objects in JavaScript?

In JavaScript, map and forEach are methods for arrays, not objects. However, you can use Object.keys(), Object.values(), or Object.entries() to iterate over objects.

So, how can I use Object.keys() with forEach?

You can use Object.keys() to get an array of the object's keys, then apply forEach to iterate over them. For example:

const obj = { a: 1, b: 2, c: 3 }; 
Object.keys(obj).forEach(key => {
  console.log(key, obj[key]);
});

What about using map? Can I convert the object values to an array?

Yes! You can use Object.values() to get an array of the values and then use map. For example:

const obj = { a: 1, b: 2, c: 3 }; 
const doubled = Object.values(obj).map(value => value * 2);
console.log(doubled); // [2, 4, 6]