first-class-collection

Introduce a first-class collection by wrapping raw lists into a dedicated domain class that centralizes business rules and prevents scattered collection logic. This pattern guarantees immutability and exposes a fluent API for safe domain operations.

The best way to enforce immutability is using a first-class collection wrapper that prevents destructive modifications. By encapsulating the collection inside a dedicated class, operations like add return new instances, ensuring safe immutability across TypeScript, Kotlin, and Java.

Yes, the first-class collection pattern is applicable across Java, Kotlin, Scala, TypeScript, Python, Ruby, Go, and Rust. It requires creating a single-responsibility wrapper class that exposes a fluent API for operations such as add, pending, isEmpty, and iteration regardless of language.

Consolidate scattered collection logic by creating a domain-first wrapper class that takes ownership of all filtering and total calculation operations. This wrapper exposes expressive APIs using domain terminology, replacing raw collection manipulation with safe, centralized methods.

Business rules scatter across utility classes when raw collections are manipulated directly instead of being wrapped. Introducing a first-class collection pattern consolidates these rules into a single-responsibility wrapper, expressing operations through domain terminology rather than generic collection methods.