Запись коллекции (22) Record Collection

Record Collection
22-ой день программы "#100 Days Of Code"

Текст задания привожу полностью:

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 data in this collection.

If prop isn't "tracks" and value isn't empty (""), update or set the value for that record album's property.

Your function must always return the entire collection object.

There are several rules for handling incomplete data:

If prop is "tracks" but the album doesn't have a "tracks" property, create an empty array before adding the new value to the album's corresponding property.

If prop is "tracks" and value isn't empty (""), push the value onto the end of the album's existing tracks array.

If value is empty (""), delete the given prop property from the album.

Попробовал разные варианты решения. Этот мне понравился больше всего. Вначале отсекаем пустую строку. Если строка пустая, то удаляем свойства.

Если свойство не traks, то изменяем значение.

Если в альбоме нет свойства traks, то добавляем его и создаем пустой массив

• Array.prototype.push()
• Object.prototype.hasOwnProperty()
• Прототип объекта
• Преобразование типов для примитивов

// 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(value===''){
    delete collection[id][prop];
  } else if(prop !="tracks"){
    collection[id][prop] = value;
  } else {
  if(!collection[id].hasOwnProperty('tracks')){
    collection[id][prop] = [];
   
  } 
    collection[id][prop].push(value);
  }
  
  return collection;
}

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

Ответы:

After updateRecords(5439, "artist", "ABBA"),
artist should be "ABBA"

After updateRecords(5439, "tracks", "Take a Chance on Me"),
tracks should have "Take a Chance on Me" as the last element.

After updateRecords(2548, "artist", ""),
artist should not be set

After updateRecords(1245, "tracks", "Addicted to Love"),
tracks should have "Addicted to Love" as the last element.

After updateRecords(2468, "tracks", "Free"),
tracks should have "1999" as the first element.

After updateRecords(2548, "tracks", ""),
tracks should not be set