Basic JavaScript - Profile Lookup

[cjh18200]

Tell us what’s happening:
Describe your issue in detail here.

Your code so far
video uses first name exactly how i use first name yet i get this error TypeError: Cannot read properties of undefined (reading ‘firstName’)

// Setup
const 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
var c = 3;
do {   c--
  if
  ( contacts[c].firstName != name && contacts[c].hasOwnProperty(prop) == prop ){ 
          console.log("No such contact");
  }else if 
  ( contacts[c].hasOwnProperty(prop) == false && contacts[c].firstName == name ){  
          console.log("No such property");
  }else if 
  ( contacts[c].hasOwnProperty(prop) && contacts[c].firstName == name ){   
          console.log(prop);     
  }
 }
 while (c >= 0 );
//only change code above this line
}

lookUpProfile("Akira", "likes");
lookUpProfile("Sherlock", "likes");
lookUpProfile("Harry", "likes");
lookUpProfile("Bob", "number");
lookUpProfile("Bob", "potato");
lookUpProfile("Akira", "address");

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Challenge: Basic JavaScript - Profile Lookup

Link to the challenge:

freeCodeCamp.org

[WongYC-66]

{
   c--
   console.log(c)
   ...
}
while (c >= 0 );

Try not to read array[-1].

[JeremyLT]

You should almost never need to use a do…while loop.