Tell us what’s happening:
Hi, would you please tell me what the difference is between this code: records[id].tracks = arr;
and this code:
records[id][tracks] = arr;
it doesn’t work with this: records[id][tracks] = arr;
**Your code so far**
// Setup
const 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) {
let arr = [];
arr.push(value);
records[id].tracks = arr;
} else if (prop == 'tracks' && value !== ''){
records[id].tracks.push(value);
} else if(value === '') {
delete records[id][prop];
}
return records;
}
updateRecords(recordCollection, 5439, 'artist', 'ABBA');
**Your browser information:**
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36
Challenge: Basic JavaScript - Record Collection
Link to the challenge: