I wanted to experiment on SSR with NextJS for a while, and creating a simple blog is a common sample project. As such, cloning my blog was a no-brainer.
In this post I'll try to demystify ReactiveX's Observables, how they can be hot or cold, and how to turn one into another. By the way, it doesn't have anything to do with Katy Perry's 2008 song.
A project I worked on was running fine for a long time when they informed me that it was crashing after a new build, all because of package versioning.