Different solution for "Profile Lookup"

I spent a few hours trying to solve this exercise by writing for loops, but for some reason I couldn’t get it to work. Then I looked up online to see if there were other methods that could achieve the same end. Finally, after some more head-scratching, I came up with an answer:

function lookUpProfile(name, prop){
// Only change code below this line
  var index = contacts.findIndex(x => x.firstName == name);
  var value = contacts.find(x => x.firstName == name); 
   if(index == -1) {
    return "No such contact";
  } else if (index > - 1) {
    if(value.firstName && value.hasOwnProperty(prop)) {
    return value[prop];
  } else if (value.firstName && value.hasOwnProperty(prop) == false) {
    return "No such property";

After I passed the test, I checked out the answer on the website, knowing that they would use a for loop and that the answer would be much simpler than mine. Now I think I understand how both solutions work.
What I wanted to understand a little bit better is this: what are the differences between using a for loop here instead of using the array.find() and array.findIndex() functions? Is there an advantage to the loop in this case, besides being simpler? Is my solution ok?


Can anyone help me? (Don’t know if it’s ok to bump. Sorry for that.)