Why the square bracket for value?

Tell us what’s happening:
in this problem Records Collection, I have managed to understand and code through the hints but I couldn’t understand the use of square brackets for “value” ?
Please explain me what is it or if I am just forgetting some syntax here records challenge
Your code so far

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

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

updateRecords(recordCollection, 5439, 'artist', 'ABBA');
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Challenge: Record Collection

Link to the challenge:

Yeah, that confuses people. Take a look at this post for an explanation. Let us know if that doesn’t clear it all up.

1 Like

Hi @chichkenmomos !

I have edited your post to wrap [spoiler] tags around your solution so it doesn’t spoil it for those who have not worked on this problem yet.

thanks! that was helpful. First I wasn’t able to relate it with my code but I ran a console.log statement to see what was happening and it was all clear !!! :smiley:

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