Tell us what’s happening:
I am getting an error that collection[id][prop] is undefined when using an input of (5439, “tracks”, “song”) and don’t know how to correct it. Any help is appreciated.
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"
}
};
// 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 (collection[id][prop] !== "tracks" && value !== ""){
console.log(collection[id][prop]);
collection[id][prop].push(value);}
else if (collection[id][prop] == "tracks" && value == "" ) {
collection[id][prop] = [value];
}
else if (collection[id][prop] == "tracks" && value !=="" ) {
collection[id][prop].push(value);
}
else {
delete collection[id][prop];
}
return collection;
}
// Alter values below to test your code
updateRecords(5439, "tracks", "ABBA");
Your browser information:
User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:62.0) Gecko/20100101 Firefox/62.0
.
Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/record-collection/