How can you ensure a specific listener is called only once for an event in Node.js?
- event.once(event, listener)
- event.addOnceListener(event, listener)
- listener.once(event)
- event.addSingleListener(event, listener)
To ensure that a specific listener is called only once for an event in Node.js, you can use the event.once(event, listener) method. This method registers the listener to be invoked only once the next time the specified event is emitted. The other options do not provide this functionality.
Loading...
Related Quiz
- You are creating a real-time chat application in Node.js where you need to broadcast binary data to multiple clients. How would you manage the binary data to ensure optimal performance and minimal memory usage?
- You are publishing a package to npm, and you want to make sure that all tests pass before the package is actually published. Which npm script would you use to run your tests before the package gets published?
- Which of the following is a common technique used for optimizing database queries?
- How can you prevent replay attacks when using OAuth 2.0?
- You are tasked with improving the reliability of a large codebase. Using Jest, how would you approach writing tests for functions with side effects like database calls or API requests?