Tell us what’s happening:
I know the solution. The code runs when i use !collection[id].hasOwnProperty(“tracks”). I might be wrong but isn’t collection[id][prop] === null the same thing? I tried both and I just want to know why this doesn’t work. Thank you.
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"
}
};
// Only change code below this line
function updateRecords(id, prop, value) {
if ( value === "") {
delete collection[id][prop];
}
else if (prop === "tracks" && collection[id][prop] === null ) {
collection[id][prop] = [];
collection[id][prop].push(value);
}
else if (prop === "tracks" && value !== null) {
collection[id][prop].push(value);
}
else {
collection[id][prop] = value;
}
return collection;
}
console.log(updateRecords(5439, "tracks", "Take a Chance on Me"));
Your browser information:
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36
.
Challenge: Record Collection
Link to the challenge: