Playing around on hackerrank to prepare for an interview, I had some fun solving tree problems using recursion.
Optimize your mobile app's performances and run "big" and "complex" queries in NoSQL, using CQRS & Serverless! (in our case, Firestore & Firebase Cloud Functions)
Ever uploaded a file to Firebase Storage, only to be hit with a 403 error when trying to access it? Here's how to get a publicly accessible URL for the file you just uploaded.
You're trying to figure out what some object looks like, and since you're not running your code locally you don't have access to a proper debugger. So you print it. And your whole Node.js app crashes. What do you do?