Build a Record Collection - Build a Record Collection

JavaScript
1

Tell us what’s happening:

i dont knjow how to complete this exercise,i haqve no idea what to do now

Your code so far

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'
  }
};

function updateRecords(records,id,prop,value){

if(value === ''){
 delete records[id][prop]
}else if(prop !== 'tracks' && value!== ''){
  records[id][prop] =value
}else if(prop === 'tracks'){
 if(Array.isArray(records[id].tracks === false)){
   records[id].tracks =[]
 }
}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/138.0.0.0 Safari/537.36

Challenge Information:

Build a Record Collection - Build a Record Collection
https://www.freecodecamp.org/learn/full-stack-developer/lab-record-collection/build-a-record-collection

2

Can you say more about how you are stuck? What is working? What is now working?

3
  1. After updateRecords(recordCollection, 5439, "tracks", "Take a Chance on Me") , tracks should have the string Take a Chance on Me as the last and only element.
4

If you check tracks what is the last (or only) element?

5

you may want to right click in the editor and click Format document, your if/else if/else is hard to read like this and you may be missing something

6

when i use:
console.log(updateRecords(recordCollection, 5439, “track”, “Take a Chance on Me”));
it shows the correct output but doesnt pass

7 
function updateRecords(records,id,prop,value){

if(value === ''){
 delete records[id][prop]
}else if(prop !== 'tracks' && value!== ''){
  records[id][prop] =value
}else if(prop === 'tracks'){
 if(Array.isArray(records[id].tracks === false)){
   records[id].tracks =[]
 }
}if(prop === 'tracks' && value !== ''){
records[id].tracks.push(value)
}

return records
}
console.log(updateRecords(recordCollection, 5439, "artist", "ABBA"))

i formatted it

8

That still is not formatted. You can tell because the inner content of the function is not indented.

9

You don’t get the error TypeError: Cannot read properties of undefined (reading 'push') when testing updateRecords(recordCollection, 5439, "tracks", "Take a Chance on Me")?

10

that’s where i need help

11 
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'
  }
};

function updateRecords(records, id, prop, value) {

  if (value === '') {

    delete records[id][prop]

  } else if (prop !== 'tracks' && value !== '') {

    records[id][prop] = value
  }
 else if (prop === 'tracks') {

    if (Array.isArray(records[id].tracks === false)) {
      records[id].tracks = []

    }
  } if (prop === 'tracks' && value !== '') {

    records[id].tracks.push(value)
  }

  return records
}
console.log(updateRecords(recordCollection, 5439, "track", "Take a Chance on Me"))
12

I don’t think this line is doing what you expect.

13 
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'
  }
};

function updateRecords(records, id, prop, value) {

  if (value === '') {

    delete records[id][prop]
  } 
else if (prop !== 'tracks' && value !== '') {
    records[id][prop] = value

  }
 else if (prop === 'tracks') {

    if (value !== '') {

      records[id].tracks = []
    }
  } 
if (prop === 'tracks' && value !== '') {

    records[id].tracks.push(value)
  }

  return records
}
console.log(updateRecords(recordCollection, 5439, "track", "Take a Chance on Me"))

still didnt pass

14

Ok, have you investigated why? Do you have more questions?

15

its passed thank you

1 Like
16

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