Scala手册:
https://docs.scala-lang.org/style/index.html
This document is intended to outline some basic Scala stylistic guidelines which should be followed with more or less fervency. Wherever possible, this guide attempts to detail why a particular style is encouraged and how it relates to other alternatives. As with all style guides, treat this document as a list of rules to be broken. There are certainly times when alternative styles should be preferred over the ones given here.
