Unexpected Results When Using Array Filter with Async Operations in JavaScript
This might be a silly question, but I'm working on a project and hit a roadblock..... I'm working with an scenario when trying to filter an array of objects based on an asynchronous condition. I've got a list of users, and I want to filter out those that are not active based on a call to an external API. The question arises because the `filter` method returns immediately, and by the time I check the user’s activity status, it’s not returning the expected results. Here’s a simplified version of my code: ```javascript const users = [ { id: 1, name: 'Alice' }, { id: 2, name: 'Bob' }, { id: 3, name: 'Charlie' } ]; async function isActive(userId) { const response = await fetch(`https://api.example.com/users/${userId}/status`); const data = await response.json(); return data.isActive; } async function getActiveUsers() { const activeUsers = users.filter(async (user) => await isActive(user.id)); return activeUsers; } getActiveUsers().then((activeUsers) => console.log(activeUsers)); ``` The question is that `activeUsers` ends up being an array of promises instead of the actual filtered array. I’m also seeing an `UnhandledPromiseRejectionWarning` in my console. I’ve tried using `Promise.all` to resolve the promises, but then I'm struggling to get the filter to work correctly. How can I properly filter this array based on an asynchronous API call without running into these issues? What would be the best practice for handling this kind of situation? I'm working on a application that needs to handle this. This is for a web app running on Debian. I'd be grateful for any help. I'm working on a web app that needs to handle this. What's the best practice here?