Basic Data Structures: Iterate Through the Keys of an Object with a for...in Statement.1

JavaScript
1

Tell us what’s happening:
The code doesn’t work. Please help.

Your code so far


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

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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

2

function countOnline(usersObj) //should be: function countOnline(obj)

3

Hello. Check this:
Function countOnline is passed a parameter called usersObj, but inside it uses (undefined variable) obj.

4

I’ve solved it just by changing that usersObj to obj in function

2 Likes