Check if an Object has a Property!

JavaScript
1

Tell us what’s happening:
I already passed the test using ‘in’ keyword instead, but I just wanted to make sure that it is not a bug in the website and I did it right. Thank You. :slight_smile:

Your code so far


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

function isEveryoneHere(obj) {
  // change code below this line
if ('Alan', 'Jeff', 'Sarah', 'Ryan' in users ){

return true;
}
return false;
  // change code above this line
}

console.log(isEveryoneHere(users));

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property

2

Hey @AndrewAlkazeer,
You are not using the arguments inside your function anywhere in your code.
Think about where you will fit in it and then try solving.
Hope that helps.

1 Like
3

In addition to what @aditya_p said (which involves changing just one specific thing in your code), this:

if ('Alan', 'Jeff', 'Sarah', 'Ryan' in users )

Is not valid syntax and will cause an error. a in y && b in y && c in y not a, b, c in y

1 Like
4

I fixed it, it worked now. Thank You :slight_smile:

function isEveryoneHere(obj) {
  // change code below this line
if (obj in users ){

return true;
}
return false;
  // change code above this line
}

console.log(isEveryoneHere('Jeff'));
6

Sure. Here we go:

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

function isEveryoneHere(obj) {
  // change code below this line
if (obj in users ){

return true;
}
return false;
  // change code above this line
}

console.log(isEveryoneHere('Jeff'));

You are right! I tried it too now and it did not pass the second test either, I do not know how I passed then, but if you check repl.it it will work :face_with_raised_eyebrow::face_with_raised_eyebrow:

Here is the link on repl.it : https://repl.it/@AndrewAlkazeer/AuthenticCrispWearables-28