record_collection.js

/* RECORD COLLECTION CHALLENGE

You are given a JSON object representing (a small part of) your record collection. Each album is identified by a unique id number and has several properties. Not all albums have complete information.

Write a function which takes an id, a property (prop), and a value.

For the given id in collection:

If value is non-blank (value !== "") and prop is not "tracks" then update or set the value for the prop.

If the prop is "tracks" and value is non-blank, push the value onto the end of the tracks array.

If value is blank, delete that prop.

Always return the entire collection object.
*/
// 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]; //DELETE A SPECIFIC OBJECT IN JSON COLLECTION
  } else if (id !== "" && prop !== "tracks") {
    collection[id][prop] = value;
  } else if (prop === "tracks" && value !== "") {
    collection[id][prop].push(value);
  }
  
  return collection;
}

// Alter values below to test your code
updateRecords(2548, "artist", "");
console.log(collection);

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

  return collection;
}
*/