Finding the Fun in Functional Programming

The Yale Haskell Group has played an integral role in the conception, evolution, implementation, and application of the Haskell programming language. We have helped to write the Haskell Report, a tutorial on Haskell, and a popular textbook: The Haskell School of Expression (SOE).

The group has focused both on advancing Haskell and on using it in interesting ways in research, education, and the real world. Most notably, we have used Haskell to construct a variety of domain-specific embedded languages (DSELs): languages that use Haskell as a framework within which to build abstractions specific to an underlying domain.

Many of our DSELs are based on a programming paradigm that we call Functional Reactive Programming, or FRP.  We have used FRP as a basis for DSELs in animation (Fran), robotics (Frob), computer vision (FVision), graphical user interfaces (Fruit), parallel programming (HPorter), networking (Nettle) and computer music (Euterpea).  We have also developed an arrow-based version of FRP called Yampa, and most of our latest DSEL’s are based on Yampa concepts.

For more information, please contact Donya Quick (


The Yale Haskell Group wishes to acknowledge the generous support of its funding agencies, including the National Science Foundation (NSF), the Defense Advanced Research Projects Agency (DARPA), and Microsoft Research.

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