Rails Engines are an architectural pattern that can be used to modularize a Rails application. They are self-contained applications that can be mounted within a larger Rails application. In this post, we will dive into the world of Rails Engines and explore what they are, how to create them, how to use them, when to use them, and why they are important.

A race condition is a type of software bug that occurs when multiple threads or processes access a shared resource simultaneously, and the outcome of the execution depends on the timing of these accesses.