Return type Are Contracts. Either[E, Option[A]] Breaks Them.
Public methods must make a single clear promise; encode absence as an explicit error variant (e.g., NotFound) and return Either[E, A] rather than Either[E, Option[A]].
Scala Days 2025, August, Lausanne: Code, Community & Innovation
Scala Days stands out as a unique tech conference with direct insights from the architects of essential tools and practices within the Scala ecosystem.
Scala Days 2025 - Functional Programming And The Real World
The Scala Days 2025 conference focuses on Functional Programming And The Real World, featuring important keynotes and an extensive array of industry speakers.
Rich Hickey's quest for a simpler programming model led to the creation of Clojure, which embodies functional programming principles and eases complexity.
