Profile Lookup Cannot read property '0' of undefined

Tell us what’s happening:
I cannot understand why the results displays “TypeError: unknown: Cannot read property ‘0’ of undefined”

Your code so far


//Setup
var contacts = [
    {
        "firstName": "Akira",
        "lastName": "Laine",
        "number": "0543236543",
        "likes": ["Pizza", "Coding", "Brownie Points"]
    },
    {
        "firstName": "Harry",
        "lastName": "Potter",
        "number": "0994372684",
        "likes": ["Hogwarts", "Magic", "Hagrid"]
    },
    {
        "firstName": "Sherlock",
        "lastName": "Holmes",
        "number": "0487345643",
        "likes": ["Intriguing Cases", "Violin"]
    },
    {
        "firstName": "Kristian",
        "lastName": "Vos",
        "number": "unknown",
        "likes": ["JavaScript", "Gaming", "Foxes"]
    }
];


function lookUpProfile(name, prop){
// Only change code below this line
for (var x = 0; x < contacts.length; x++); {
  if(contacts[x].firstName === name){
    if(contacts[x].hasOwnProperty(prop)){
      return contacts[x][prop];
    } else {
      return "No such property";
    }
  }
} return "No such contact";
// Only change code above this line
}

// Change these values to test your function
lookUpProfile("Akira", "likes");

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/profile-lookup

For some reason you have placed a semi-colon at the end of your for loop declaration. Get rid of that semi-colon and it will work fine.

for (var x = 0; x < contacts.length; x++); {
1 Like

Thank You sir! That helped