Profile Lookup – open my eyes, please

Tell us what’s happening:
Why it doesn’t work?

Your code so far

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(firstName, prop){
// Only change code below this line
  for (var i = 0; i < contacts.lenth; i++) {
    if (contacts[i].firstName === firstName) {
      if(contacts[i].hasOwnProperty(prop)) {
        return contacts[i][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:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36.

Link to the challenge:

UPD: I found a mistake. I wrote “lenth” instead length :confused:
Sry for my stupidity.

Your for loop doesn’t run, because length is misspelled.

Unfortunately, a typo on an object property doesn’t throw an error; instead, contacts.lenth evaluates to undefined, which means the first iteration of the for loop checks 0 < undefined.

undefined coerces to 0, so 0 < undefined returns false, so the loop never runs.

Yep, you’re right, seems I was mistaken. Looks like it actually coerces to NaN (+undefined => NaN), which will evaluate as unequal to any number (but also neither greater than nor less than).

1 Like