Basic JavaScript - Record Collection

JavaScript
1

Tell us what’s happening:

I kinda understand what I need to do. But whatever I try, it doesn’t seem to work. Can you tell me what I’m doing wrong?

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 (value === "") {
  delete records.id[prop];
} else if (prop !== "tracks" && value !== "") {
records[id][prop] = records[id][value];
} else if (prop === "tracks" && value !== "" && id.hasOwnProperty("tracks") === false) {
records[id][tracks] = [];
tracks.push(value);
} else if (prop === "tracks" && value !== "") {
records[id][tracks].push(value)
}
  return records;
}

console.log(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/122.0.0.0 Safari/537.36

Challenge Information:

Basic JavaScript - Record Collection

2

Try focusing at a single case at a time. Otherwise it’s easy to get distracted by all the things that might need keeping track of.

Taking as example the one from code:

console.log(updateRecords(recordCollection, 5439, 'artist', 'ABBA'));

The relevant id printed in console from what function returns:

(...)
  '5439': { albumTitle: 'ABBA Gold', artist: undefined }
(...)

Consider what does it mean that artist got added undefined? Which part of code added it and why? What’s the related user story for this case?

3

I think that instead of “what added "undefined" ?” it’s more of “which part of code isn’t working?”. Cause it it should’ve added “ABBA” ?

4

That’s one way to look at it, both are related. Saying isn’t working is really it isn’t working as intended, because it should do (…). However at all times it is working the way it’s in the code.

5 
} else if (prop == 'artist' && value !== "") {

artist.push(value);

}

I’m trying to make it put artist’s name from value into artist

6

That’s not in the original code? What’s the artist variable, where is it defined?

7

There’s no "artist" in the original code. I need to add that property to 5439

8

I’m talking about artist variable from artist.push(value). Unless artist variable is declared somewhere that will always give error.

9 
} else if (prop === "artist" && value !== "" && id.hasOwnProperty("artist") === false) {
  records.artist = [];
artist.push(value);
}

So, I’ve this. I just kinda created an empty array for the artist’s name to go to. The reason why I didn’t have this before is bc I only thought about it after I talked to you.

10

That creates new property on the record, but the name of it is literally "artist".

console.log(record.artist)  // []

However there’s still no artist variable declared, so artist.push(value) will end up with error.

11

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