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layout: post title: Record Collection date: 2017-11-29 —

Record Collection

In this challenge i were given a JSON object representing a part of musical album collection. Each album has several properties and a unique id number as its key. Not all albums have complete information.

I were suppose to 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.

Code Explanation:

First checks if prop is equal to tracks AND if value isn’t a blank string. If both tests pass, value is pushed into the tracks array. If that first check doesn’t pass, it next checks only if value isn’t a blank string. If that test passes, either a new key (prop) and value (value) are added to the object, or an existing key is updated if the prop already exists. If both these checks fail (meaning value must be an empty string), then the key (prop) is removed from the object.

My Approach

Method 1

Firstly , I created a variable called collection that stores ecach albulm that has several properties and unique id number as its key.

Method 2

In my first test statement i said if property(prop) is tracks but the album doesn’t have aproperty, create an empty array before adding the new value to the album’s corresponding property.

On my second statement i said if value is empty(“”), delete the given property(prop) from the album.

On My third statement i said if property(pro) is not tracks then update or set the value for the record albulm’s property.

and my last statement i said If prop is “tracks” and value isn’t empty (“”), push the value onto the end of the album’s existing tracks array.

Finally is working like i tested all the test and the first test returns ABBA after updated records(5439,”artist”,”ABBA”) and my second test returns “Take a Chance on Me” After updateRecords(5439, “tracks”, “Take a Chance on Me”) etc.