Record Collection Revisit

Hi Guys!

I’m reviewing Javascript and got to Record Collection challenge again. The first time it took me quite a long time to figure out a code that works. A week later, I revisited to see if I am still able to get the solution on my own, which I did, even faster than the first time.

However, I looked at their solution under “Get a hint”, and have a question about their solution:

function updateRecords(id, prop, value) {
  if (prop === "tracks" && value !== "") {
   if(collection[id][prop]) {
   else {
  } else if (value !== "") {
    collection[id][prop] = value;
  } else {
    delete collection[id][prop];

  return collection;

What is the difference between:
collection[id][prop] = value; ?

They use both in their solution. I reviewed how to update object properties in previous lessons, and the only guess I can make is that the first one makes it an array, and the second one stores it as whatever data type ‘value’ brings.

Is that correct?

Thanks, all!

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Yup that is correct. The first will set collection[id][prop] to be an array containing just value which can later be used to call push(value) a couple lines up. The other just sets the value straight into collection[id][prop]

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