Assignment Evaluation Error in Basic Data Structures: Iterate Through the Keys of an Object with a for...in Statement

JavaScript
#1

Assignment Error

Hi everyone, I think I might have spotted a bug in the webpage.

I’ve been struggling with the assignment Basic Data Structures: Iterate Through the Keys of an Object with a for…in Statement

It seems odd that my code doesn’t work when I run it on the Chrome Console and it gives me the expected output.

Code


function countOnline(usersObj) {
// change code below this line
usersCounter = 0;
for(let user in usersObj)
{
  
  if(usersObj[user].online)
  {
    usersCounter++;
  }
  
}
return usersCounter;
// change code above this line
}

Furthermore, whenever I copy the solution provided by FCC, which is the following:

Code

let users = {
  Alan: {
    age: 27,
    online: false
  },
  Jeff: {
    age: 32,
    online: true
  },
  Sarah: {
    age: 48,
    online: false
  },
  Ryan: {
    age: 19,
    online: true
  }
};
function countOnline(obj) {
  // change code below this line
  let result = 0;
  for (let user in obj) {
    if (obj[user].online === true) {
      result++;
    }
  }
  return result;
  // change code above this line
}
console.log(countOnline(users));

Browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36.

Challenge: Iterate Through the Keys of an Object with a for…in Statement

Link to the challenge:
https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-the-keys-of-an-object-with-a-for...in-statement

I have already refreshed the browser page and even closed and reopened the page.

Is something else I’m missing?

Thank you all for your help,

Togeri.

#2

Use var or let to scope the usersCounter variable. It should work then -

let usersCounter = 0;

1 Like
#3

Damn I can’t get my mind used to ES6. I’m just stupid, hahaha.

Moving this from Contributors to Programming Help.

Your answer has been marked as Solution. Thank you very much @Manish-Giri !

1 Like
#4