Basic JavaScript - Record Collection - bXOu4mclvZXvDyQqUUiF3

JavaScript
1

Hello - thanks for that camp, i’m not new in the IT but noob in JS,
so I’ve try that lesson - one day is gone … and now I’ve a question.

I start with help from video, try my self ‘solution’ and same form forum - no luck.
ok back too roots and try only one by one condition and check exactly that it do …

Can it be that delete recordCollection[id][prop]; deletes more in that env as it should.
Check it in codepen.io who it do rigth.

great, you can see my ‘work’, so here also console output - as I see, propertie artist is also gone?

Thank you for Help.

// — console --_
Start Func: [object Object] 2548 tracks
no value so DO delete: 2548 tracks - next line(s) array befor and after delete
so artist is also ‘gone’??
{ albumTitle: ‘Slippery When Wet’,
artist: ‘Bon Jovi’,
tracks: [ ‘Let It Rock’, ‘You Give Love a Bad Name’ ] }
{ albumTitle: ‘Slippery When Wet’, artist: ‘Bon Jovi’ }

// — EOF —

  **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) {
console.log("Start Func: "+records+" " +id+" "+ prop +" "+ value);
 if(!value){
  console.log("no value so DO delete: " + id + " " + prop + " - next line(s) array befor and after delete 
 so artist is also 'gone'??");
  console.log(recordCollection[id]);
  delete recordCollection[id][prop]; 
  console.log(recordCollection[id]); 
 }
}

//updateRecords(recordCollection, 5439, 'artist', 'ABBA');
//updateRecords(recordCollection, 5439, "tracks", "Take a Chance on Me");
//console.log('id 5439 tracks: ' + recordCollection[5439].tracks)
///*updateRecords(recordCollection, 2548, "artist", "");
//updateRecords(recordCollection, 1245, "tracks", "Addicted to Love");
//updateRecords(recordCollection, 2468, "tracks", "Free");

updateRecords(recordCollection, 2548, "tracks", "");
//updateRecords(recordCollection, 1245, "albumTitle", "Riptide")
//*/
//console.log(recordCollection);





  **Your browser information:**

User Agent is: Mozilla/5.0 (X11; Linux x86_64; rv:101.0) Gecko/20100101 Firefox/101.0

Challenge: Basic JavaScript - Record Collection

Link to the challenge:

2

You should only use records. You should ignore the recordCollection global variable.

3

Why gone? It’s in your last line of log

4

Thank you - I’ll will looking too.

5

console.log ? I think it is that:

{ albumTitle: ‘Slippery When Wet’,
artist: ‘Bon Jovi’,
tracks: [ ‘Let It Rock’, ‘You Give Love a Bad Name’ ] }
{ albumTitle: ‘Slippery When Wet’, artist: ‘Bon Jovi’ }

so last line has propertie albumTitle but only - where is artist , then I try to
delete recordCollection[id][prop];
and prop is tracks …

6

Ahh re-read mail …
you are right - a one liner, so need a try again. Thanks !

7

you have both albumTitle and artist there…

8

Hello ilenia,
I’ve rewritten that lesson - video has helped… but also no luck. I’ve try that also in codepen.io and I think it works. Code at end of mail.
#x are my conditions intern Numbers - console.log trace simply id, param and value …

running test say not success at:

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.
=>>> but in console log:
start function - para: 5439 tracks Take a Chance on Me
#3 & 4 - prop ‘tracks’ 5439 tracks Take a Chance on Me

  • after update #3&4 array[id][prop] is: Take a Chance on Me

After updateRecords(recordCollection, 2548, "artist", ""), artist should not be set
=>>>but in console.log:
start function - para: 2548 artist
#5 no value 2548 artist

  • after update #5 array[id][prop] is: undefined

After updateRecords(recordCollection, 2548, "tracks", ""), tracks should not be set
=>>>but in console.log
start function - para: 2548 tracks
#5 no value 2548 tracks

  • after update #5 array[id][prop] is: undefined

so I think all conditions are fulfilled, do you have any hint for me?
it is my last lessen, I’m at 99% so I’ll be happy to solve that last thing.

Thanks for your patience
Regards.

// # # # here my code - and output in freecodecamp.com # # #

 // 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) {
  
  console.log("start function - para:  "+id+" "+prop+" "+value)
  //zu 5 - empty value
  if (!value) {
    console.log("#5 no value " + id + " " + prop + " " + value);
    delete recordCollection[id][prop];
    console.log("  - after update #5 array[id][prop] is: " + recordCollection[id][prop]);
    //zu 3 u. 4 - if prop == tracks && value in 5.)  ->   set/Update value
  } else if (prop == 'tracks') {
    console.log("#3 & 4 - prop 'tracks' " + id + " " + prop + " " + value);
    recordCollection[id][prop] = recordCollection[id][prop] || [];
    recordCollection[id][prop].push(value);
    console.log("  - after update #3&4 array[id][prop] is: " + recordCollection[id][prop]);
    //zu 2. - prop not tracks 
  } else if (prop != 'tracks') {
    console.log("#2 not prop 'tracks' " + id + " " + prop + " " + value);
    recordCollection[id][prop] = value;
    console.log("  - after update #2 array[id][prop] is: " + recordCollection[id][prop]);
  }
  //zu 1
  return recordCollection;

}

//updateRecords(recordCollection, 5439, 'artist', 'ABBA');

///////// log window ///////////
hmmm - no simple copy & paste possible, but I’ve written the most above

9

You still cannot reference the global variable. Ignoring the first function argument will cause your function to fail to meet the requirements.

10

Hi JeremyLT, Yes you are right ! That do the trick …
I do not know (this time) what ‘piece’ of array exactly is in the function, also in records but I should realise that.
So now I’m ready for the next part.

Can/should I mark that as solved?

11

it’s marked as solved.

you can mark a topic as solved by marking one of the posts in it as solution

12

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