Phil Freeman - Fun with Profunctors

Phil Freeman introduces profunctor optics, explaining how they generalize lenses, prisms, and traversals with practical examples.

Van Laarhoven lenses have become an indispensable part of the Haskell programmer's toolbox, and a powerful abstraction tool. However, it can be difficult to get a handle on this implementation of lenses. The Profunctor type class provides another motivation for this style of programming, and one which generalizes nicely to related concepts like Prisms and Traversals. In this talk, Phil will give an introduction to profunctor optics, with plenty of examples. profunctors: hackage.haskell.org/package/profunctors lens: hackage.haskell.org/package/lens purescript-profunctor-lenses: pursuit.purescript.org/packages/purescript-profunctor-lenses… purescript-optic-ui: github.com/zrho/purescript-optic-ui/ purescript-thermite: github.com/paf31/purescript-thermite/ This was recorded at Brainium in Santa Monica during a Santa Monica Haskell meetup: meetup.com/santa-monica-haskell/events/230270785/