Leaning on the type system for as many guarantees as possible. A few of my teams use Kotlin's sealed classes and extension methods to prevent a lot of goofy inv

Leaning on the type system for as many guarantees as possible. A few of my teams use Kotlin's sealed classes and extension methods to prevent a lot of goofy invalid state and improve composability (using a Result<T, E> sum type very similar to what Rust has built-in). I liked this article I recently came across discussing the topic: https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-validate/ https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-va...