Scala Language Best Practices Prefer a Functional Style, Reasonably
Example
By default:
- Use
val, notvar, wherever possible. This allows you to take seamless advantage of a number of functional utilities, including work distribution. - Use
recursionandcomprehensionss, not loops. - Use immutable collections. This is a corrolary to using
valwhenever possible. - Focus on data transformations, CQRS-style logic, and not CRUD.
There are good reasons to choose non-functional style:
varcan be used for local state (for example, inside an actor).mutablegives better performance in certain situations.
