👀 Views: 225 💬 Answers: 1 📅 Created: 2025-06-16

javascript sorting json JavaScript

I'm converting an old project and Does anyone know how to I'm trying to sort an array of nested JSON objects based on a deeply nested property, but I'm working with unexpected behavior... The goal is to sort by `user.details.age`, but the sort function doesn't seem to correctly handle the cases where the `age` property is missing or set to `null`. Here's what my data looks like: ```javascript const users = [ { id: 1, user: { details: { age: 25 } } }, { id: 2, user: { details: {} } }, { id: 3, user: { details: { age: null } } }, { id: 4, user: { details: { age: 30 } } }, { id: 5, user: { details: { age: 20 } } } ]; ``` I attempted to sort this array using the following code: ```javascript const sortedUsers = users.sort((a, b) => { const ageA = a.user.details.age; const ageB = b.user.details.age; return (ageA || 0) - (ageB || 0); }); ``` However, the result is not as expected: ```javascript console.log(sortedUsers); ``` Instead of getting a correctly sorted array, I see that users with missing or null ages are appearing in the wrong order. I expected users without an age to sort to the end of the array, but they are intermixed with users who have valid ages. I'm not sure how to gracefully handle the cases where `age` is undefined or null, ensuring they are sorted as the lowest values. Is there a better approach to handle this sorting scenario, potentially using a fallback value or a more robust comparison? Any advice or best practices would be appreciated! How would you solve this?