Cats is a library which provides abstractions for functional programming in the Scala programming language. The name is a playful shortening of the word category. Scala supports both object-oriented and functional programming, and this is reflected in the hybrid approach of the standard library. Cats strives to provide functional programming abstractions that are core, binary compatible, modular, approachable and efficient. A broader goal of Cats is to provide a foundation for an ecosystem of pure, typeful libraries to support functional programming in Scala applications. Cats strives to provide a solid and stable foundation for an ecosystem of FP libraries. Thus, we treat backward binary compatibility maintenance with a high priority. In semantic versioning, backward breaking change is only allowed between major versions.
Features
- Cats is available for Scala.js and Scala Native, as well as the standard JVM runtime
- Cats relies on improved type inference via the fix for SI-2712
- Binary compatibility and versioning
- Cats strives to provide a solid and stable foundation for an ecosystem of FP libraries
- Scala supports both object-oriented and functional programming
- A broader goal of Cats is to provide a foundation for an ecosystem of pure, typeful libraries
Project Samples
