Scala documentation is a bit hard to understand, some articles do not have a good balance in their level of detail... e.g: documentation for Futures and Promise

Scala documentation is a bit hard to understand, some articles do not have a good balance in their level of detail... e.g: documentation for Futures and Promises. I use text-to-speech to read it since it can be a bit dense. Scala.js is great, but it is different (numeric primitives, threads, to start with).