Adding an Object to JSON with a Dynamic Key Name in Node.js

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The Problem at Hand

In our scenario, we have a JSON structure where songs are represented as objects with different titles. When attempting to add a new song using a method called saveSongs, the key of the object needs to be set to the title of the song itself. Here’s an example of what we are dealing with:

[[See Video to Reveal this Text or Code Snippet]]

In this JSON, the object for a new song added with the saveSongs function mistakenly sets "title" as the key. What we actually need is for "yyyy" to be the key instead of "title".

The Solution

To resolve this issue, we need to modify the way we create the newSong object so that the dynamic key, which is the song title, is set correctly. Here's a step-by-step guide to implement the fix:

Step 1: Correctly Creating the newSong Object

Instead of using quotes around the dynamic key, we can utilize the bracket notation [] in JavaScript. This allows the key to be evaluated at runtime, using the value of the title variable. Here's how to do it:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Updating the File Reading Method

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Explanation of Changes

Dynamic Key Assignment: By using bracket notation with [title], the key of newSong is set to be the value of the title variable, which is what we want.

Now, when you call saveSongs("yyyy", "", "ggggg"), it correctly adds the song with "yyyy" as the key:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion