How can I iterate over objects in JavaScript?

How can I iterate over objects in JavaScript?

You can use several methods to iterate over objects in JavaScript, such as for...in, Object.keys(), and Object.entries(). Which one would you like to know more about?

Can you explain how to use Object.keys()?

Sure! Object.keys() returns an array of a given object's own enumerable property names. You can then use forEach to iterate over these keys.

Can you show me an example?

Absolutely! Here's a simple example:

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

This will log each key and its corresponding value.

What about using for...in?

The for...in loop iterates over all enumerable properties of an object. Here's how you can use it:

for (let key in obj) {
  console.log(key, obj[key]);
}

Just be cautious, as it will also iterate over inherited properties.