freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/basic-data-structures/generate-an-array-of-all-object-keys-with-object.keys/index.md

---
title: Generate an Array of All Object Keys with Object.keys()
---
## Generate an Array of All Object Keys with Object.keys()

### Method:

- To return the array of users the `Object.keys()` method must take an arguement.
- This challenge can be solved using a single line return statement. 

### Solution:

```javascript

let users = {
  Alan: {
    age: 27,
    online: false
  },
  Jeff: {
    age: 32,
    online: true
  },
  Sarah: {
    age: 48,
    online: false
  },
  Ryan: {
    age: 19,
    online: true
  }
};

function getArrayOfUsers(obj) {
  // change code below this line
  return Object.keys(obj);
  // change code above this line
}

console.log(getArrayOfUsers(users));

```