Trying to return an object of an array returning undefined using the find() function

Question

I'm trying to return an album object given a specified track. Given this array:

const albumCollection = [
    {
        id: 2125,
        title: 'Use Your Illusion',
        artist: "Guns N' Roses",
        tracks: ['November Rain', "Don't Cry"]
    },

    {
        id: 2975,
        title: '1999',
        artist: 'Prince',
        tracks: ['1999', 'Little Red Corvette']
    },

    {
        id: 1257,
        title: 'Transformer',
        artist: 'Lou Reed',
        tracks: ['Vicious', 'Perfect Day', 'Walking on the Wild Side']
    },

And using the following function, both the commented and uncommented code returns undefined. I'm trying to understand why. What I'm trying to do is return the album as an object based on the track name.

function getAlbumWithTrack(track) {
    /*
    const result = albumCollection.find((item) => item.id === track);
    console.log(result);
    */
    return albumCollection.find(function (title) {
        return title.track === track;
    });
}

console.log(getAlbumWithTrack('Little Red Corvette'));
console.log(getAlbumWithTrack('November Rain'));
console.log(getAlbumWithTrack('perfect day'));

David · Accepted Answer · 2022-09-29 19:51:51Z

5

On this line:

return title.track === track;

There is no property called track on your objects. It's called tracks, and it's an array so it would never equal a string value. I suspect you're looking for this:

return title.tracks.includes(track);

For example:

const albumCollection = [
    {
        id: 2125,
        title: 'Use Your Illusion',
        artist: "Guns N' Roses",
        tracks: ['November Rain', "Don't Cry"]
    },

    {
        id: 2975,
        title: '1999',
        artist: 'Prince',
        tracks: ['1999', 'Little Red Corvette']
    },

    {
        id: 1257,
        title: 'Transformer',
        artist: 'Lou Reed',
        tracks: ['Vicious', 'Perfect Day', 'Walking on the Wild Side']
    }
];

function getAlbumWithTrack(track) {
    return albumCollection.find(function (title) {
        return title.tracks.includes(track);
    });
}

console.log(getAlbumWithTrack('Little Red Corvette'));
console.log(getAlbumWithTrack('November Rain'));
console.log(getAlbumWithTrack('perfect day'));

answered Sep 29, 2022 at 19:51

David

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2 Comments

cderhammer Over a year ago

Thank you very much, it always seems that it's the little things like a misspelling. I appreciate it!

Terry Over a year ago

@ConorDerhammercderhammer Almost half an hour has passed: remember to mark the answer as accepted since the poster’s solution worked.

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