Struggling to Parse Nested JSON with Varying Key Structures in JavaScript - Unexpected Undefined Values
After trying multiple solutions online, I still can't figure this out. I'm prototyping a solution and I'm trying to parse a deeply nested JSON object in JavaScript, but I'm working with issues with keys that have inconsistent structures. For example, I have JSON data that looks like this: ```json { "users": [ { "id": 1, "name": "Alice", "details": { "email": "alice@example.com", "preferences": { "notifications": true } } }, { "id": 2, "name": "Bob", "details": { "email": "bob@example.com" // Missing 'preferences' key here } } ] } ``` I want to extract the user's email and their notification preference if it exists, but I'm getting `undefined` for the notification preference when it’s not present. Here’s the code I wrote: ```javascript const jsonData = { "users": [ { "id": 1, "name": "Alice", "details": { "email": "alice@example.com", "preferences": { "notifications": true } } }, { "id": 2, "name": "Bob", "details": { "email": "bob@example.com" } } ] }; jsonData.users.forEach(user => { const email = user.details.email; const notifications = user.details.preferences ? user.details.preferences.notifications : null; console.log(`User: ${user.name}, Email: ${email}, Notifications: ${notifications}`); }); ``` This results in the output: ``` User: Alice, Email: alice@example.com, Notifications: true User: Bob, Email: bob@example.com, Notifications: null ``` While this handles the absence of `preferences`, I want to ensure that if the key exists, I access the value directly instead of getting `null`. Is there a more efficient way to handle this condition without cluttering my code with checks? Also, I’m using Node.js v14.15.0. Any suggestions for a cleaner approach or best practices in managing such nested structures would be helpful! For context: I'm using Javascript on Ubuntu. Is there a better approach? I'm working on a application that needs to handle this. Am I approaching this the right way? I've been using Javascript for about a year now. Any help would be greatly appreciated! I'm using Javascript 3.11 in this project. Any suggestions would be helpful.