// 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"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
if (prop == "tracks" && value !== "") {
collection[id][prop].push(value);
} else if (value !== "") {
collection[id][prop] = value;
} else if (value === "") {
delete collection[id][prop];
}
return collection;
}
// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");
I cleaned up your code.
You need to use triple backticks to post code to the forum.
See this post for details.
You’re getting this error:
TypeError: Cannot read property 'push' of undefined
That’s because the object at "5439"
has no tracks
property. You should check if a record has a tracks
property first before pushing a value.