I need some help with Profile Lookup

JavaScript
1

Tell us what’s happening:
I have been trying to get this to work but for some reason it always returns undefined any hints?

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
if (name == contacts[3].firstName || contacts[2].firstName || contacts[1].firstName || contacts[0].firstname) {
  if (name == contacts[3].firstName) {
    return(contacts[3].prop)
  }
  if (name == contacts[2].firstName) {
    return(contacts[2].prop)
  }
  if (name == contacts[1].firstName) {
    return(contacts[1].prop)
  }
  if (name == contacts[0].firstName) {
    return(contacts[0].prop)
  }
else {
  return ("No such contact")
}
}
// Only change code above this line
}

console.log(lookUpProfile("Kristian", "lastName"))

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36.

Challenge: Profile Lookup

Link to the challenge:

2

This line will cause some bugs for you. The first conditional is correct, but the rest are not. contacts[2].firstName, for example, will evaluate to true (unless undefined). So your if block will execute, but if the nested if statements all evaluate to false, your function will not hit a return statement and will then implicitly return undefined.

3

also these are always undefined as you can’t use variables with dot notation and the objects don’t have properties named prop

4

Good catch! I didn’t even notice that :sweat_smile:

5

ohh thanks i did not think of that

6 
// 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
  if (name == contacts[3].firstName || name == contacts[2].firstName || name == contacts[1].firstName || name == contacts[0].firstname) {
    if (name == contacts[3].firstName) {
      return(contacts[3][prop])
    }
    if (name == contacts[2].firstName) {
      return(contacts[2][prop])
    }
    if (name == contacts[1].firstName) {
      return(contacts[1][prop])
    }
    if (name == contacts[0].firstName) {
      return(contacts[0][prop])
    }
  else {
    return ("No such contact")
  }
  }
// Only change code above this line
}

console.log(lookUpProfile("Sherlock", "likes"))

i almost have it

7

Two things:

  1. When does your function currently return “No such contact” - and when should it?
  2. What should your function return if the contact exists but the property does not?
8
  1. It should return that when the contact does not exist but it just keeps returning undefined when i do that
  2. It should return “No such property” but i’m not sure how to make it do that
9

once the name check, you always return contacts[...][prop]
what happens if the value of prop is not a property of the object?

10

i’m just gonna watch the video i don’t think im smart enough

11

You can do this! You’re very much on the right track. :slightly_smiling_face: