I dont know what i did

JavaScript
1

Tell us what’s happening:
so i was doing this challenge and have no idea how i got it right. at first i built what i thought they asked for but it kept on failing, then while playing around with the code it was accepted . the problem is now i don’t know how to read my own mess. it works, but how?

Your code so far


// Setup
var collection = {
 2548: {
   album: "Slippery When Wet",
   artist: "Bon Jovi",
   tracks: [
     "Let It Rock",
     "You Give Love a Bad Name"
   ]
 },
 2468: {
   album: "1999",
   artist: "Prince",
   tracks: [
     "1999",
     "Little Red Corvette"
   ]
 },
 1245: {
   artist: "Robert Palmer",
   tracks: [ ]
 },
 5439: {
   album: "ABBA Gold"
 }
};

// Only change code below this line
function updateRecords(id, prop, value) {
if (value !== ""){
  if (prop !== "tracks"){
    collection[id][prop] = value;
  }else if (prop == "tracks" && collection[id].hasOwnProperty("tracks") == false ){
    collection[id][prop] = [];
  }else if (collection[id].hasOwnProperty('tracks')){
    collection[id][prop].push(value);
  }
}else {
  delete collection[id][prop];
}

 return collection;
}
console.log(
updateRecords(5439, "tracks", "Take a Chance on Me"));

Your browser information:

User Agent is: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0.

Challenge: Record Collection

Link to the challenge:

2

what do you not understand of your code?

3

so if i remove the console.log at the bottom then the code does not work, or even if i change the updateRecords() values it does not work.why is this?

4

do you mean that if you remove the function call then the code doesn’t pass the tests?

can you describe the expected behavrious and what happens instead?

5

that is correct. i don’t know why it happens.

6

and in that case, what do the tests say?

I imagine it is because if the object doesn’t have a tracks property you just create an empty array and don’t add the value to the array