Undifined when looping data

Curriculum Help
1

Tell us what’s happening:
I can’t figure out why data isn’t printed when I test on REPL.

Your code so far


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

Your browser information:

User Agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36.

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

Link to the challenge:

2

what’s your code on repl.it?

you need a function call and a console.log command

3

I do that, my code in repl.it same as code in above. I just insert the object in repl.it

4

do you get an error or something?

can you share your repl?

5
6

Can I know where I wrong? I’m so confused, I think that was the correct answer. Already compared with documentation didn’t wrong at parameter or something.

7

well, you get undefined

to debug more, add other console.log statements

for example like this:

function countOnline(usersObj) {
  // Only change code below this line
  
  let n = 0;
  console.log({n})
  for (let user in usersObj){
    console.log({user, 'user.online': user.online, 'user.online === true': user.online === true})
    if (user.online === true){
      console.log(user + ' is online')
      return n++;
    }
  }
  // Only change code above this line
}
8

Allright, ill tried first. Thank you :smiley:

9

as you want to learn to debug, I’m just giving hints on how to do that, if there is something you do not understand, feel free to ask

10

Yeah i have question, can you please give me a hint why my repl.it at line 6: console.log(user.online) give me undefined?

What should i read more? this problem should be here.

11

a string doesn’t have the online property

12

new hint: if the string doesn’t have the online property… what does?

13

advice: do not use the return statement on anything you are testing, that stops the function, use console.log commands, like console.log(typeof(user))

14

Damn, i wont click those blurred :joy:
Thank you @ILM, i already figure out how to do that. MDN is the best :joy:

15

for what I see your code, it’s an “almost”

console.log output is undefined, so data is undefined and data.online gives an error

16

Yeap, but what should i do is write a obj[variable].target

17

yes, that’s better

just do not assign console.log to anything, doing data = console.log() is pretty much the same as doing data = undefined

18

your return statement should outside for loop