You are given a JSON object representing a part of your musical album collection. Each album has several properties and a unique id number as its key. Not all albums have complete information. Write a function which takes an album's id (like 2548), a property prop (like "artist" or "tracks"), and a value (like "Addicted to Love") to modify the d…

record-collection.js

// 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) {
  //if a value is set...
  if(value !==""){
    //first check if the property is not 'tracks'. If it's anything else, update
    //that entry with the new value.
    if(prop !== "tracks"){
      collection[id][prop] = value;
    }
    //otherwise if the property IS 'tracks'...
    else{
      //see if the collection id already has a 'tracks' property. If it does
      //push the new value to the array.
      if(collection[id].hasOwnProperty("tracks")){
        collection[id][prop].push(value);
      }
      //if there is no tracks property create one and add the array.
      else{
        var arr = [value];
        collection[id][prop] = arr;
      }
    }
  } //end if there's a value
  
  //if there's no value set for the property then delete that property
  else{
    delete collection[id][prop];
  }
  
  return collection;
}

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