Record Collection[where and how to use push method ]

Record Collection[where and how to use push method ]
0.0 0

#1

Tell us what’s happening:

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"
    }
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));

// Only change code below this line
function updateRecords(id, prop, value) {
  
  
  return collection;
}

// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/record-collection


#2

Try this

function updateRecords(id, prop, value) {
  if (prop === "tracks" && value !== "") {
    if (collection[id][prop]) {
      collection[id][prop].push(value);
    } else {
      collection[id][prop] = [value];
    }
  } else if (value !== "") {
    collection[id][prop] = value;
  } else {
    delete collection[id][prop];
  }
  return collection;
}

#3

sorry,
but it is not working


#4

What have you tried so far?
It looks like you just posted the challenge with no code of your own…


#5

i tried this

  collection[5439].push({
    "prop":"Billy Joel"
  });

#6

after a long try finally i got answer::stuck_out_tongue_winking_eye:
just write it under function:

collection[5439]["artist"]="ABBA";
  collection[5439]["tracks"]=["Take a Chance on Me"];
  collection[1245]["tracks"]=["Addicted to Love"];
  collection[1245]["album"]="Riptide";
  delete collection[2548]["tracks"];
  delete collection[2548]["artist"];
  

hurrey.


#7

I have a question.

The expression

if (collection[id][prop]) {...

Does it mean collection[id][prop] = value or does it mean if collection[id][prop] exists?

It seems to me like it an incomplete sentence.

If (?) then…

Could you please explain it to me? Thank you?